Are 10" backing plates from a B body 7 1/4 the same as the A body 10" backing plates for the A body 7 1/4? Thank you drive through.
Nope, different. The B-body 7 1/4 backing plates (6 cylinder car with the 10 X 1 3/4" brake shoes) are the same as the A-body with an 8 3/4, not the 7 1/4. The A-body 7 1/4 only uses 4 mounting studs.Are 10" backing plates from a B body 7 1/4 the same as the A body 10" backing plates for the A body 7 1/4? Thank you drive through.
What year is the donor B-body car? '65-7? What do you need to "nail it down"? I can give you the part numbers of the backing plates in 1966 if you want.
Why not just get some 10" ones off an A-body 7 1/4? There should be plenty of those around. The B-body ones are a 5 bolt mounting, like the 8 3/4.
That's what I want and am looking for. S'why I asked about the interchangeability.
SBP 7 1/4 has a smaller diameter center hole, bearing is smaller, than 8 3/4
In the last 3 years someone posted a photo of a SBP, 7 1/4, 10 x1 3/4 backing plate next to a SBP, 8 3/4, 10 x 1 3/4 backing plate, center home was different.
Could be for BBP 7 1/4.I’m 95% sure I checked the hole size when we swapped out the axles and they were the same
Could be for BBP 7 1/4.
I was told 7 1/4 and 8 3/4 SBP 10 X 1 3/4 would swap. The photo posted proved otherwise.
BBP 7 1/4 A-body rear ends use 10 X 2 1/2" brakes, SBP 7 1/4 rears (with 10" brakes) measure 10 X 1 3/4". The backing plates won't interchange for that reason alone.