At 9.35:1 static compression ratio, the cylinder pressure may be a little light for a 224/224 cam. You may have been better off using a cam with 215-218 degrees @0.050" tappet lift. Either that, or use the 224/224 cam with up around 10.0:1 static compression ratio. Exchange the stock converter for one that stalls at 2500/3000. That'll get you past the soggy part of the cam. Put some gear in the rear, at least a 3.73.
Lose the Summit intake, replace with a Edelbrock RPM or Weiand Stealth. Bolt on some long-tube, equal-length headers with 1 3/4" primary tubes. Fabricate an X or H right after the collectors, use 2 5/8" or 2 3/4" pipes, through the mufflers of your choice, back to the rear bumper.
What did you do for valve springs? Are these L31 heads or aftermarket?