I picked up a 14 bolt ff with NON-slide on drums, pumpkin housing is ribbed top and bottom. (was told it was out of a 80s truck, unknown if swr or dually)
I've taken some measurements, below is what ive gathered:
WMS-WMS = 67"
Backing plate flange to flange = 54"
Shock mounts are 31" oc from...