Performer rpm or M-1 intake

What converter? The converter is a very important component in the intake decision making process. I would suspect that below 5000 rpm the Performer RPM will outperform the M-1. Above 5000 rpm the M-1 may outperform the RPM, but I doubt by very much, considering you are still running a factory head and your cam is not really radical. If you have a 4000+ converter, the swap probably won't make much difference. If you have less than that, a swap to the RPM would probably be beneficial.