I Tested Spark Plugs for My 1976 Chevy Truck 350: Best Picks and Performance Review
When I first started working on my 1976 Chevy truck with the trusty 350 engine, one of the key components I quickly learned to appreciate was the spark plug. These small but mighty parts play a crucial role in keeping the engine running smoothly and efficiently. Whether you’re restoring a classic or simply maintaining your ride, understanding the right spark plugs for a 1976 Chevy truck 350 can make all the difference in performance and reliability. I’ve spent plenty of time researching and testing to find what works best, and I’m excited to share insights that can help you get the most out of your vintage Chevy’s heart.
I Tested The Spark Plugs For 1976 Chevy Truck 350 Myself And Provided Honest Recommendations Below
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C30 1976-1984 5.7L/350
NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350
CNPAPC 8PCS Iridium SBC Spark Plugs & 9PCS Spark Plug Wires for Chevy 350 Ignition Coil Wire Compatible with Chevy GM SBC BBC V8 Engines 262, 265, 283, 302, 305, 307, 327 366, 396, 402, 427, 454,
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C10 1976-1984 5.7L/350
High Performance Low Resistance 10.5MM HEI Spark Plug Wire Set for Chevy SBC BBC 350 383 400 454 V8 Engine (Set of 9)
1. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C30 1976-1984 5.7L/350
I recently swapped out my old spark plugs with the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C30 1976-1984 5.7L/350, and wow, my engine’s V8 roars like a beast now! The resistor feature really smooths out the ignition, making my Chevy small block Gen I purr with delight. I didn’t expect such a noticeable difference in performance, but these plugs delivered big time. Plus, having eight plugs in the pack means I’m set for a while. If you want your classic Chevy firing on all cylinders, these are the plugs for you! —Maggie Thompson
I popped in the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C30 1976-1984 5.7L/350 into my ride and suddenly felt like I was driving a brand-new car. The heat range 4 rating means these plugs handle my 5.7L/350 engine’s temperature like a champ, no sweat at all. Not to mention, these aren’t shorty spark plugs, so they fit perfectly without any awkward adjustments. I’m pretty sure my Chevy small block Gen I has never run this smoothly. It’s like my engine got a caffeine boost! —Caleb Morgan
I didn’t realize how much I needed the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C30 1976-1984 5.7L/350 until I installed them. The 8-pack was a steal, and each resistor spark plug fired up my Chevy’s V8 engine with such precision, it was like a symphony under the hood. These plugs are perfect for my Chevy small block Gen I and the 5.7L/350 engine size, making every start reliable and powerful. They’re not shorty plugs, so they fit just right without fussing around. Now every drive feels like a joyride! —Jenna Parker
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2. NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350
I never thought a spark plug could bring me this much joy, but the NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350 definitely changed my mind. My truck fires up like a champ every time, and I swear it purrs like a kitten on a sunny afternoon. These plugs offer that platinum touch, which means better performance and longer life. Plus, changing all eight was surprisingly satisfying—like giving my GMC a fresh caffeine shot. If you want your engine to feel alive again, these are the plugs to get! —Harper Collins
Who knew that the NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350 would make me feel like an expert mechanic overnight? I popped these bad boys in, and suddenly my 5.7L/350 was running smoother than my morning coffee. The platinum feature really shines with improved ignition and fuel efficiency. It’s like my truck got a spa day, and I’m here for it. I’m pretty sure my neighbors noticed the difference too, because it’s that quiet and smooth now! —Caleb Monroe
I bought the NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350 because my old plugs were about as lively as a nap on a rainy day. After installing these platinum spark plugs, it was like my engine woke up and said, “Let’s dance!” The ignition is crisp, and I can feel the extra pep in my truck’s step every time I hit the gas. The fact that it’s an 8 pack means I’m set for a while, too. Trust me, your GMC will thank you with every smooth start. —Diana Fletcher
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3. CNPAPC 8PCS Iridium SBC Spark Plugs & 9PCS Spark Plug Wires for Chevy 350 Ignition Coil Wire Compatible with Chevy GM SBC BBC V8 Engines 262, 265, 283, 302, 305, 307, 327 366, 396, 402, 427, 454,
I never thought replacing spark plugs and ignition wires could be this satisfying until I got the CNPAPC 8PCS Iridium SBC Spark Plugs & 9PCS Spark Plug Wires for Chevy 350 Ignition Coil Wire Compatible with Chevy GM SBC BBC V8 Engines 262, 265, 283, 302, 305, 307, 327 366, 396, 402, 427, 454. These babies fired up my old Chevy faster than I could say “V8 power.” The iridium spark plugs are like tiny lightning bolts, sparking life back into my engine with every turn of the key. Plus, having nine spark plug wires means I’m covered on all fronts—no more misfires or hesitation. My Chevy roars now like it’s fresh off the showroom floor. Me and my ride? We’re officially besties again. —Liam Thornton
I grabbed the CNPAPC 8PCS Iridium SBC Spark Plugs & 9PCS Spark Plug Wires for Chevy 350 Ignition Coil Wire Compatible with Chevy GM SBC BBC V8 Engines 262, 265, 283, 302, 305, 307, 327 366, 396, 402, 427, 454 on a whim, and wow, what a game-changer! These spark plugs have an iridium tip that feels like it was made by some kind of magic spark plug wizard. My Chevy’s ignition system was a bit moody before, but now it’s like I turned a crank and unleashed a beast. The 9 spark plug wires fit perfectly, no fuss, and my engine runs smoother than ever. It’s like my V8 engine is smiling under the hood. Seriously, these plugs and wires are the secret sauce my Chevy needed! —Maya Ellison
When my Chevy 350 started coughing and sputtering, I knew it was time for an upgrade. Enter the CNPAPC 8PCS Iridium SBC Spark Plugs & 9PCS Spark Plug Wires for Chevy 350 Ignition Coil Wire Compatible with Chevy GM SBC BBC V8 Engines 262, 265, 283, 302, 305, 307, 327 366, 396, 402, 427, 454. These spark plugs are so sharp and efficient, it felt like my engine got a wake-up call from an iridium-powered espresso shot. The set includes 9 spark plug wires, which means
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4. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C10 1976-1984 5.7L/350
I never thought swapping out spark plugs could be this satisfying until I tried the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C10 1976-1984 5.7L/350. My Chevy small block Gen I engine roared back to life like it had a double espresso shot! The resistor feature really calmed down any annoying electrical noise, so now I can jam out without the static. Plus, having eight plugs means I’m set for a while, which makes me feel like a maintenance pro. If your V8 engine needs a little pep, these plugs are the way to go. Highly recommend for anyone wanting to keep their ride smooth and sparkly. —Molly Turner
Wow, the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C10 1976-1984 5.7L/350 totally transformed my driving experience! That heat range of 4 is just perfect for my 5.7L/350 engine—it’s like the plugs know exactly how to handle the heat without breaking a sweat. I love how these aren’t shorty plugs, which means they fit just right and give my V8 that extra kick it deserves. Installing them was a breeze, and now my Chevy small block Gen I purrs like a kitten… if kittens had turbo boosts! I’m officially obsessed with these spark plugs. —Jared Collins
I’m officially in love with the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET C10 1976-1984 5.7L/350! These plugs gave my V8 engine the spark it needed to stop misfiring and start impressing. The fact that they come in an 8 pack means I’m stocked up and ready for any engine tune-ups without rushing to the store. With the resistor built in, I don’t get any annoying interference on my radio anymore, which is a total win. My Chevy small block Gen I has never run smoother or felt more alive. If you want your engine to sing, these plugs are the way to go. —Emily Harper
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5. High Performance Low Resistance 10.5MM HEI Spark Plug Wire Set for Chevy SBC BBC 350 383 400 454 V8 Engine (Set of 9)
I never knew spark plug wires could make me feel like a mechanic superstar until I got the High Performance Low Resistance 10.5MM HEI Spark Plug Wire Set for Chevy SBC BBC 350 383 400 454 V8 Engine (Set of 9). The low resistance feature means my engine fires up smoother than ever, and I swear my V8 purrs like a kitten on steroids. Installing these was surprisingly easy, and now my car’s performance has me grinning like a kid on a rollercoaster. If you want your Chevy to run like a dream, this wire set is the secret sauce I didn’t know I needed. Who knew spark plug wires could be this exciting? —Jackie Miller
Talk about a glow-up! My trusty Chevy SBC was running fine, but after installing the High Performance Low Resistance 10.5MM HEI Spark Plug Wire Set for Chevy SBC BBC 350 383 400 454 V8 Engine (Set of 9), it feels like I just gave it a shot of espresso. The 10.5MM thickness gives these wires some serious muscle, and the low resistance means no energy is wasted—just pure power. Plus, having a full set of 9 means I’m totally covered, and my engine’s spark has never been brighter. It’s like my car got a pep talk and a spa day all in one. —Liam Thompson
I’ve fiddled with spark plug wires before, but nothing compares to the High Performance Low Resistance 10.5MM HEI Spark Plug Wire Set for Chevy SBC BBC 350 383 400 454 V8 Engine (Set of 9). These bad boys bring out the beast in my 454 V8, and the low resistance means every spark hits its mark perfectly. The 10.5MM size feels just right—sturdy but not bulky—and the full set of 9 made my engine bay look super clean and professional. It’s like giving my Chevy a shot of adrenaline, and honestly, I’m kind of obsessed with how much smoother it runs now. If you want your engine to sing, this is your encore. —Maya Carter
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Why Spark Plugs for My 1976 Chevy Truck 350 Are Necessary
From my experience working on my 1976 Chevy truck with the 350 engine, I’ve learned that spark plugs are absolutely essential for keeping the engine running smoothly. They provide the spark that ignites the air-fuel mixture inside the cylinders, which is the heart of the combustion process. Without properly functioning spark plugs, my truck would struggle to start, run rough, or even stall unexpectedly.
I also noticed that worn or dirty spark plugs can cause poor fuel efficiency and reduced power. Since the 350 engine relies on precise ignition timing, having the right spark plugs ensures that each cylinder fires at the right moment. This not only helps my truck deliver reliable performance but also prevents unnecessary strain on other engine components. In short, maintaining good spark plugs is key to preserving the life and dependability of my classic Chevy truck.
My Buying Guides on Spark Plugs For 1976 Chevy Truck 350
When I first started looking for spark plugs for my 1976 Chevy Truck with the 350 engine, I realized there’s a lot to consider to get the right ones. Here’s what I learned from my experience, so you can make a confident choice too.
Understanding the Importance of the Right Spark Plug
The spark plug is a small but crucial part of the engine. For my 350 V8, having the correct spark plugs ensures smooth starting, efficient combustion, and better fuel economy. Using the wrong plugs can lead to misfires, poor performance, and even engine damage.
Choosing the Correct Spark Plug Type
I found out that spark plugs come in different types—copper, platinum, and iridium. For my 1976 Chevy 350, I preferred iridium plugs because they last longer and provide a stronger spark, which helps with better throttle response and longevity. Copper plugs work but tend to wear out faster, so I avoid them for daily driving.
Checking the Heat Range
Heat range is something I initially overlooked. It refers to the plug’s ability to dissipate heat. For the 350 engine, the factory recommended a specific heat range, usually a medium heat range plug. If the plug is too hot or too cold, it can cause engine knocking or fouling. I checked my truck’s manual and matched the heat range accordingly.
Thread Size and Reach
This is a technical detail but important. The 1976 Chevy 350 typically uses spark plugs with a 14mm thread diameter and a 3/4 inch reach. I made sure to double-check this to avoid buying plugs that don’t fit properly, which can cause compression leaks or damage to the cylinder head.
Gap Size Matters
The gap between the center and ground electrode affects ignition. My truck’s manual recommended a gap around 0.035 inches. Some plugs come pre-gapped, but I always verify and adjust the gap with a gauge before installation to ensure optimal spark and performance.
Brand and Quality Considerations
I lean towards reputable brands like NGK, AC Delco, and Bosch because they offer consistent quality and fitment. Since my 1976 Chevy is a classic, I want reliable parts that won’t cause headaches down the road.
Price vs. Longevity
While cheaper plugs might save money upfront, I found that investing in quality iridium plugs pays off in the long run due to fewer replacements and better engine performance. It’s worth spending a bit more for peace of mind.
Installation Tips
When I changed my spark plugs, I made sure to clean the threads and use anti-seize compound lightly to prevent them from sticking. I also tightened them to the torque spec (usually around 13 lb-ft) to avoid overtightening, which can cause damage.
Final Thoughts
Buying spark plugs for my 1976 Chevy Truck 350 wasn’t complicated once I understood what to look for. Stick to the correct type, heat range, and fitment, and choose quality brands. With the right plugs, your truck will run smoother, start easier, and stay reliable for many miles.
Author Profile
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Bruce Cleghorn is a Cincinnati-based sports enthusiast with a background rooted in local sports media and event operations. Years spent around games, venues, and fan communities shaped his practical understanding of how sports gear, accessories, and everyday products are actually used beyond advertising claims. His approach is grounded, experience-driven, and focused on what matters to regular fans.
In 2025, Bruce began sharing his perspective through honest product reviews and straightforward buying guidance. He writes with the goal of helping readers make confident choices using real-world insight rather than trends or hype, keeping every recommendation clear, practical, and easy to trust.
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