Performer RPM Intake: Improvement possible?

Hi, forgot about the rest of the combo: 750 Ultra DP, 3500 rpm 9.5" converter, 904 trans, 4.11 Gears with 27" Tires. Compression is 10:1.

I run cheap 1 5/8" headers, but can´t afford to get bigger ones now. Rest of exhaust is 3" system with X-Pipe and cutouts, then going into some dynomax turbos. I run open exhaust at the track. PB with iron heads (indy X) and the old cam (242/236 @ .050", around .580" Lift) was 11.40, i´d really like to get into the ten second zone what i think it will...but if there is any improvement possible at the intake i´d like to do it.

Michael
Is that cam a typo; 242/236