We had a 67 F100 with a 300 six, it was a rebuilt with the Chevy power economy grind on the cam, something the local rebuilder did as standard.
We put a center hung Holly 390 CFM, looked like a monster but tiny ventures, headers wit blown out glass packs.
Ran great.
We first put a 750 cfm carb on and it really would go, but sucked too much fuel.
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