Just go with a old school 44 or 49 turbo with Alky kit. Sounds like you have the rest of supporting mods already. With these mods you will not have any problem walking by that SS or most mustangs on the street. I went from a stock turbo to a TE-44 turbo , Alky kit, race rebuild transmission
from janis, and a 2800 ptc lock up 10" converter and felt like the car picked up 150 hp. Good luck and have fun with it!!!