Pinion angle question

While doing it "the other way" is more complex, it does make sure that you will not have to run shims under the spring perches to change the pinion angle. Doing it "my way" means there is margin for error there, but nine times out of ten it's either dead on or very close.
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