Intake manifold. Copied Elddebrock performer RPM.

but yet an enginemasters 318 motor, under 10.5 compression and with a flat tappet cam made 477 horsepower at the competition with one
several very sharp cookies involved in that impressive build.
find it hard to believe they ran a crosswinds intake with a 40 horse liability instead of just using an EdelBrock.
heck that little motor would have made 517 horsepower
Interesting comparison. Was it as cast? What RPM?