RidgeRunnerXJ previously posted:
"There is ALOT of info out there about this swap but you have to wade through pages and pages of arguments and mis-information to get the right answers."
That, there is!
I scored a set of used unit bearings from a '99, set one next to my trail spare for the '90. The big difference is from the knuckle to the flange for the rotor and wheel. From the knuckle mounting surface, to where the stub axle seats, is the same. I'll be ordering 1/4" spacers from JKS to get the U-joint axis, back in line with the ball joint axis.
EDIT: When I get ball joints installed, maybe we can take some pictures to illustrate that critical alignment.