As said above, it won't be cheap nor easy. I'm building a T1 EFI Turbo and its a pain in the a$$. Lots of dough too. Do some research and then do it again. I'll hopefully be done this spring after about a year and a half, but its well worth it. 200-250. Try 300+. That's no joke. 1914 T's are getting over 200 and street driven. You dont need big displacement with a turbo to turn good #'s. IMO I'm not a big fan of carbs with a turbo so EFI would be a good idea. EMS more gooder.
Get a plan, then build. I'd like to see more turbo aircooled cars. Don't forget drivetrain either!! Good luck!!