1969 Dart GT 340 EFI E85 Turbo Build

Is your combo a 360? Eddy Heads that are stockfish?

I think you would be worlds ahead with a cam swap, I believe there is way more in that set up. As far as only getting 7 psi, there is a guy with a 5.3 LS that is pushing over 20 PSI with 1 GT45. Cam timing events play a big roll in boost lag and how much PSI you will get.

You should call Bullet Cams and get a custom grind for your exact set up. I see 750+ HP to the wheels in your future if you do & over 20 PSI!

What transmission and converter are in it?