Re: Need ignition upgrade help/advice.
Sounds like fuel starvation somewhere.....I would pull the sending unit out of the tank and see if there's a bunch of crap built up on it....then check the tank. After that I would disconnect and blow out all fuel lines. There could be some blockage in the main jet of the carb still. I had a pesky arctic cat quad with a rather odd carb design do that to me....first 3rd of the throttle was fine....floor it and no change except you could hear it bog. Turns out there was a bit of crap stuck in the main jet "tube" where the fuel flows after the jet. Issue is different issues can cause the same symptoms. If you are sure you have a clean fuel system and good carb...then there's still something else lacking.
Edit: Check fuel filter or filters for any signs....excess crap built up...or really any crap at all.
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1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
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