Re: installed a new 6:1 head now a tapping noise
The best blend is an improvement in all areas,head,cam carb and exhaust..each area aides the effect of the other.
Good rules of thumb in my opinion,your views may vary..
keep compression at 7 to 1 or under
two updraft carbs better than one updraft carb,one downdraft carb better than two updraft carbs
the more cam lift the better,stock B at .319 measured lift,way better than stock A at .287 measured..B cam has a better profile as well.
Stock exhaust manifold breathes well,header breathes great...open..but you'll wake the dead,almost all the header gain is lost with a resonator.
mechanical advance distributor insures accurate timing at all rpm ranges,and avoid damaging 'ping' the killer of main bearings
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