If you are running U-joints, the general the rule of thumb is you want the diff to be at the same angle as the transmission, you don't want to tilt the pinion to be in line with the d-line.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed