[fastback69]

I've contemplated building a 65-66 coupe with a turbo 2.3, 5spd. It would be light and it would handle great. I say go for it. A properly sized turbo will spool at whatever rpm you want it to. Huge turbos capable of monster HP are the ones that spool late because of large turbine housings. A small turbine like a .48 A/R should spool in the mid to high 2000 rpm range. You won't need anything more than a T3 to make that car scoot. Turbo cars get pretty good gas mileage too when you're out of the boost. You can even tune the svo computer (or modify a A9L mustang EEC) to run the 2.3l with a TwEECer. It's nice to see someone with some imagination. Good luck with the project.