Yeah, a 2.3 turbo isn't going to just slip into a pre-'74 Pinto. The radiator is inadequate, a mechanical fan won't fit, the intake will hit the hood, the pan will probably hit the rack, a (Ford) T5's shifter doesn't align with the tunnel hole, the 2.0 engine mounts are spot-welded to the frame and have to be replaced with 2.3 parts, etc.
If I were going to do a V8, it would probably be a little aluminum Rover V8. For a turbo with less of the swap hassle, probably a vintage kit for the 2.0.