The GSL-SE (FB) had the first production 13b. There didn't have a factory turbo 13b in the united states until the FC (1986-1992) in 1987. As far as turbo kits, you can find anything if you look hard enough, but it shouldn't be too difficult.

If I were you, I would get the car sorted and verify everything was in proper working order first. Then I'd drive it and enjoy it. Upgrade the suspension and enjoy it some more. If you're still power hungry, then after you've actually done some research, go get a turbo kit (or swap in a 13bt).

Btw....pics or it didn't happen