Why do the turbo on the GA? Just go get an SR20Det. Problem solved. Comes with a factory turbo. An S13 SR20Det is rated 205 horses while the S14 (Or maybe it was the S15) is rated at 215. That's stock. Upgrade to a slightly larger turbo and you'll easily pushing out over 250 horses and you haven't even gotten started on one of these things yet. You can pull over 500 horses out of these things. The downside is plan on paying at least $2,500 for an S14 ($1,000-$2,500 for an S13).
Just buy a front clip with the motor so you know how to hook everything up. If I get this '96 Sentra GXE I'm looking at that's my plan.
You'd walk all over that 'stang. You'd have almost the same amount of power in a car that weighs almost half as much. Replace some body parts with Carbon Fiber and that gap keeps growing. Better brush up on those driving skills.
Edit: Sorry but I just noticed you live in Orem. That's awesome. I live up in Roy. =)