1950 ford custom/1990 ranger rear end install.

[ActionYobbo]

You need to focus more on your pinion angle.
Mark your axle at the distance the inside of the perch should sit then assemble the whole shebang and set your pinion angle then tack weld them perches to the axle. Take it all back out and weld up the perches a bit at a time allowing cooling between welds and apply paint