Originally Posted by LittleTruck
Ok, I did some more research and found that lots of people are using 37-41 Ford spindles, Can anyone tell me why the 37-41 spindles are superior to others? I'll try to post a picture tomorrow of my setup and get some opinions.
There are two popular groups, the 37 - 41 Ford and the 42 - 48 Ford. The 37 - 41 are called round back and the 42 - 48 are called square back. Neither is superoir to the other...just different backing plates. There are kits galore for both types. I have the 42 - 48 square back on my 32. I have 56 Ford F-100 drum brakes ( a old popular 50's and 60's brake upgrade ) and the 56 F-100 backing plates are square so they fit better. I would have had to grind away some of the spindle on a 37 - 41 spindle for the F-100 backing plates to fit. The 37 spindles came with mechanical brakes. Ford went to hydraulic in 1939. In 1942, Ford came out with a square back backing plate ......which resists twisting on the spindle better than the round backing plate one... so....the 42 to 48 are actually the improved version ...
for stock backing plates...
I have Wilwood disc brakes on my new under construction 32 Ford......