Look @ the last 2 pgs of this topic.
https://www.inliners.org/ubbthreads/ubbthreads.php?ubb=showflat&Number=72483#Post724831978-82ish Buick regal turbo set-up
1981 turbo Trans Am turbo set-up will work.
Try & get a complete set-up w/a carb.
http://imageshack.us/f/233/p1090134s.jpg/http://imageshack.us/f/831/p1090133os.jpg/I convinced a guy here to turbo his stock engine. He even boosted up to 15 psi. Long story....
Running low boost like 4-5 psi will be no problem on a stock engine. Just don't let it detonate.
MBHD