A body leaf spring hangers and bolts

krazykuda said
Slant 6 cars had a 1/2" diameter bolt, the v-8 cars got a 5/8" diameter bolt.

That's not correct. I've had a lot of cars here and parted out. Never had a /6 car and I have 5 sets of 1/2" through hole hangers. V8 cars got the 1/2 bolt hanger often.