Read my plugs, was carbon fouling on 93 pump gas but not on 96 vp?

Hey guys i just was wanting to get some guidance on this subject, ever since i had the 340 in my demon rebuilt when i restored it the plugs always look carbon fouled, ive never had a miss caused by it but they always look black. I change them every 2 years and never have a issue, im just wanting to know possible solutions or things to rule out. Now a little bit on the engine build, 69 340 block, bored .040 over, lunati voo doo cam (dont remember the specs but its not a extremely aggressive...

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Author: admin