Most commonly people say axles from a 90-93 Teg. you cna check out
www.raxles.com Kind of pricey, but i"ve heard good things about them.
PR3 or a PWO ecu.....the PR3 is recommended.
I'd get stainless steel headers.
If you're getting an ew clutch you might as well get a lightened flywheel too. You won't regret that purchase!!!!
Don't forget mounts and harness.