Which way should I go with pinion angle ??????????????????????

because where the axle connects to the spring is not level with the ground ;)

this is what Cass sent me via email when setting up my dana60 (Cass = doctor diff)

"A stock A-body spec Dana housing is 52 5/8" wide with the driver's side tube 1 3/8" longer than the passenger's side.

If you install my offset spring hanger/shackle kit, spring perches will be 42" on center. Pinion points upward 5 degrees when the perches are level with the ground."

the 42" dimension is because i have the 1/2" offset kit. normally that is 43 i think

but the pinion points upward 5 degrees when perches are level with the ground

that's the info for welding the perches on. nose up 5 degrees when perches level with the floor.

once you mount the axle on the springs it will be where it's supposed to be, unless you have some weird springs.