My 418 Build

What intake and carb? I'd probably step it down to a 274ish cam, I don't think you need that much stall speed the engine gonna be done by 5500rpm plus with the 3.23:1 gears a little mismatch. If was a street/strip car I'd go with bigger cam, stall, gears and single plane but the occasional trip the strip I think you be happier dial back a bit.