I assume you are trying to put together a back yard turbo. If not ebay had a Callaway stg 2 kit up. I havent looked for it recently....in the last day or two but I assume its still up.

The exh manifold is usually the hardest thing to find. Saab turbos are usually the turbos of choice for moderate HP. Use the plumbing from an Isuzu turbo...it can be modified pretty easily. You can run regular CIS with an oxy sensor but you may want to add some type of boost sensitive enrichment system. An easy way to go is the Audi 5000 turbo warm up regulator. That will add fuel as boost increases. The other way to go is with a g-60 wire harness. This is a lot more work since it involves a harness. Also the FF tranny is usually the best tranny for a turbo set-up. The close ratio boxes from 83-84 dont allow the turbo to spool up

Patrick