you have aftermarket 15" or 16"??? 15" are OEM.
Be aware that if you put in a Gen 2 axle many wheels will not have a large enough hole in the center to fit over the rear axle. I posted the size diffences awhile back but I don't think it got archived.
You'll need a min. 108 mm for gen 2. Gen 1 are 97 mm if I recall.
Alot of arguement here,,,but 10.5 width tires are by man. recommened / designed for 7.5" rims. They will go on 6" but I think it would add to a squirmy feeling on highway, esp. going thru curvy roads.
On your T bar crank, you should (I can't think of the term, senior moment) nose should be a little lower than rear.
Make sure you get an alignment soon, and don't put it off cause things feel ok. I screwed around and toe in wore 2 tires.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.