Pinion angle question

I'm gonna get my old rear end and measure it and see where it was just to double check. As long as it's not terribly off I dont see it causing a problem I have shims tho if i need them i bought them when i did my shackles like 19 years ago because i was told i would need them and i never used them lol

That's a SMART idea. In fact, I would be confident enough to match that rear end, because it was likely right.