400 horsepower low compression 360

360, 9.5:1, nothing fancy J heads, XE268H (prefer the voodoo grind), LD340/AG/RPM, headers, 750 carb combo will make in the 350-360+ range all day long and be enough to push a basic A body at 3300 to around 108-110+ in the 1/4 mile.

Do a real good clean up in the ports and it will push a bunch closer to 400 and be docile enough to drive around and not be a PIA. Still have a little chop at idle.