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

More info -
Motor - 408 all forged internal balance - hyd roller 238/242 @.50 .580/.580, 10.5 to 1, complete MSD ignition, 35 total timing all in by 3000, 1 3/4" headers full dual exhaust to back. Adding 200 shot nitrous.

Car - 3250 weight, auto with 3500 stall, 3.91 rear gear - Street/Strip

M1. What carb?