New cap, rotor, plugs, battery, alternator, and plug wires. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. If i put a 400 sbc crank and rods in my stock 350 what difference is it going to make.? While spark plug gap does not have a direct effect on timing, excessive gap in a power adder application can easily cause engine misfire. Favourite answer. The benefit of wider plug gaps is a more complete burning of the fuel mixture. Easy to use parts catalog. Spark plug gap for 1997 vortec 5.7? Find CHEVROLET 5.7L/350 Chevy small block Gen I ACDelco Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! Answer Save. Where is ecm in 1990 chevy truck? 1987 Chevy Silverado. 5. Spark plug gap 1977 350 chevy blazer? How much horsepower does a 1969 350 Chevy engine have? I … 10 Answers. The product also gets surface air gap firing technology and the yttrium electrodes are responsible for air-fuel mixture and for reducing wear and tear. 0 1. riesgo. thats it. There are several tools you can use to both measure and adjust the gap. If you get the Davis Unified Ignition for AMC which is basically a souped up HEI, they recommend .055-.060. It also is easy to install thereby, giving a long-lasting spark. Plugs are Autolite 85 (with nascar performance). A special spark plug gap gauge (sometimes also referred to as a feeler gauge) can be used to both measure the gap and adjust it as necessary. Im pretty sure the engine is out of an early 70's truck, but the block is apparently the same. The truck will start, then run for about ten seconds and die. The proper spark plug gap for a 1980 Chevy 350 Pickup is .045, according to spark plug manufacturer (Autolite, Bosch, NGK) specs. Location: Main Index » Forum Index » Trucks-Vans-SUV » 1973-1987 Fullsize Trucks, Vans, 1973-1991 Blazers, Suburbans » 5.7 tbi spark plug gap FusionBB™ Version 2.1 ©2003-2006 InteractivePHP, Inc. I have a 1969 Chevelle with a chevy 350 engine. Thanks for your time A simple feeler gauge can be used to measure the gap. My 1987 Chevy 3/4 ton has a 350, TBI. Justin M. 1 decade ago. Your truck is throttle body injected so the gap would be .045 thats what the chilton manual calls for. I need to know what gap I should put for the sparkplugs, and I am running an HEI distributor and a hitatchi mini starter if that matters. The cap and rotor should be fine since the system was designed for a wider gap. ACCEL 0526-4 Spark Plugs for Chevy 350. The appropriate spark plug gap for the Chevrolet 5.7-liter 350 V-8 is 0.035 inch. 4 years ago. Lv 4. This firing ability also allows wider spark plug gaps-in the vicinity of 0.050-0.055-inch. 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