Hi All, Well, I'm almost done with the engine swap and got my built-up V8 in the Jeep. I got to thinking and have a quick question. After modifying the ignition system, is there any logical method or rule of thumb for changing the factory-recommended spark plug gap? I did a lot of hot rodding and a few drag races when I was a kid but there's gotta be a better approach than, "Let's open the gap a little more and see how it does." Engine in question is an '86 Chevy 350cid V8 engine with [305 heads], TPI, HEI ignition, headers, high voltage coil, "performance" 8mm plug wires. If anyone can shed more light on the effects of the 305 V8 on the 350 block as compared to Vette heads (Sorry, no further info on those other than they were from an '86 Vette and I couldn't have 'em:), I'd appreciate that as well. I think the head casting number is 462624 and the flow could be better. Best Regards, Jim P.S. I know the Jeep's not a hot rod and don't intend to ever drive it like that. But, when the guy I asked the TPI about said, "There's no way in hell you can do what you're talkin' about; TPI, computer, to That transmission in a thirty year old Jeep? You don't know what you're doin'. No way." I had no choice:) I'm sure it'll manage the trails just fine.
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19 years ago