My 400 is 11.5:1 comp with a 108LSA solid roller camshaft with E-Heads and it runs on pump fuel without issue. I’m probably going to start running it in e10 ethanol as it really likes e85. Don’t be too scared about compression with the right cam and todays fuels. This is a street car too.
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'71 Holden HQ Monaro - 3850lbs race weight, 400c/i - 11.4 @ 120
'66 Pontiac GTO - 389, 4 speed street cruiser
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