8.75 vs 8.25 Brake Drums

[Bruzilla]

Are the brake drums for an 8.75 rear the same as for an 8.25 rear? I found a guy selling a 67 C-body 8.75, but it is complete except for the drums, and I was wondering if the 8.25 drums off my 74 Road Runner would work.

 

[69Bee]

The main difference is the diameter and the width of the shoe. As long as the break shoe for the 8 3/4 axle and the 8 1/4 axle are the same width, you will be fine.

 

[5.7 hemi]

You should be able to bolt on the backing plates and all hardware from your RR to the 8 3/4 with no problems.

 

[flypaper]

i would guess no
as said above,
the width of the shoes/drum will determine if it will work out or not.
alot of c bodies will use a 11x3 drum,some earlier ones used the 11x2 drum
the b bodies will use a 11x 2 1/2 drum or a smaller 10.5 drum
the common drum sizes are
10.5 x 2 1/2
11 x 2
11x2 1/2
11x3
the backing plates are also specifc to the width of the shoes/drum,
so there are 4 different size backing plates it could be.
so your 74 runner drums might not work out for you.
they need to match the c body shoe/backing plate width
you might need to find the right width drums for it to match the c body backing plates/shoe size.
it really all depends on the shoe/drum/backing plate size.
they all neeed to match up.
so check the width and go from there..