Source a 3.0 r150. Everything will work out fine doing it that way. For that setup you use the 3.4 flywheel, 3.4 pilot bearing, 3.4 clutch disk (installed with the bulge facing flywheel no matter what is stamped on clutch disk) and 3.4 pressure plate. The throw out bearing will be for the 3.0.
The bell housing and input shaft are both longer on the newer version. So switching bell housings won't solve the issue. Use a 3.0 version MT and be done. (I've ran this setup for over a decade. Flawless). I would imagine you could rig up some bullshit with a 3/4" spacer or whatever is needed with older bell housing mated to newer trans but then the shift lever may not be centered and be too far back. Just starts being dumb. It's just sort of dumb doing it that way IMO when you can get a used unit for a few hundred bucks.
Here's the picture of the clutch disk install. I got burned really bad using an AISIN clutch that was marked wrong. 3.4's put the clutch disk backwards of most.