 
  spindle lengths:
rear seal shoulder(RSS) to axle end- 8 1/8"
RSS to spindle end- 6 1/8"
RSS to outer bearing shoulder 3 7/8"
 |  
  back plate bolt patter is 6 on 6", center hole diameter is 5" |  
  starting with the rear passenger side as it has the leaky lower wheel cylinder, upper cylinder appears to be much newer |   |