70 GMC 4wd version

[70stroker]

Well today i got the rear ends swapped out......... sorta. I guess the 2 and 4wd spring perch width is different? Csn anyone verify this? i managed to get the 4wd one in the 2wd frame by ratchet strapping the springs closer together, which is fine because its going to scrap once i get the body off, however i wantto do the 4wd correctly.

So i started to grind off all the old perches and bump stop brackets on my 2wd axle. Got about half way then it started to rain so i had to pull the corvette in, and i wasnt about to grind right next to it.

So few questions.
2wd vs 4wd spring perch width, different or did the po just screw up mine when he did his homemade axle flip?

Where can i buy spring perches to weld on?

What should the pinion angle be when i weld on my new perches?

Anyone know where i can buy and angle gauge to determine pinion angle? Link?

Thanks in advance