I need to point my pinion up a few degrees. So the wedge will be fat end facing rear. This will decrease caster. What will this do for driveability. Forums talk about fat end facing forward. That would make my pinion point down even more.
It will probably make it wander all over the place. You'll need to cut and rotate the yokes at the end of the axle to get some caster back. Is the u joint binding? Another solution is an offset u joint and/or grinding the yokes for clearance.