wasn't that the intent of the streetmaster? Really it was designed for stock exhaust, cams, and heads, with highway gears. I ran the Holley street Dominator on the low dollar 318. The factory cast 340 intake went 1.5 tenths quicker than the dominator even though the cast had an adaptor for the spreadbore to square Holley carb. Amazingly, the street dominator 60 ft the same, though.