Some snags with my conversion

We actually have the identical kit, the American powertrain one has the same bearing and collar, just anodized blue.

My cousin has a small machine shop so he is taking off .315 ish thou from the collar, should get me exactly at -.150 with one shim and the collar.

Failing that I will try your solution.

I won't even dare using the stud as it sounds like it will be the same one you have.