2 notes here.
1) EA82 TURBO axles are 25 spline and will fit any EA82 car with any 25 spine trans (EA82 turbo or EJ AWD)
2) No adapter plate, and no shifter/driveline/crossmember mods needed if you do one simple, complex thing. Swap the Loyale S/R 4wd trans guts and tailsection into Early EJ AWD 5spd cases. All you need is a dead EJ box (preferably not spun bearing) and some time and the Right Stuff sealant. good time to install 4 new seals in the trans. Use EJ flywheel and Clutch.
And last note, yeah a turbo is really too much trouble........unless you got time and money a plenty and don't care about spending. EJ18 or 22 swap from 90's Legs and Imps cars are plenty for the EA body.