Port my current M1 single plane or install the RPM Air Gap?

autoxcuda said
I have a similar combo, but smaller cam (236/[email protected] .502 /.511 110 L/C), ported M1, mild ported Edelbrock heads, 9.7:1. 750 DP silver claw carb, TTI step headers.

Ottmundr said
Do BOTH, compare them and sell the one you don't like. It's not like you can take the monopoly money with you when you die, and it's becoming worth less and less by the day.

The RPM is on my 72 W300s 408 but it currently has a spun bearing.