Have you tried looking at some early F450 beam axles, over here they seem to be more prevalent than P30 ones. They come with twin piston calipers, but smaller rotors than the 3500HD since fords only came with 16" wheel, and either crossover or front back steering setups. The bolt pattern is the same but the center bores are larger than what you have now.

http://imagehost.isoftdata.com/phpT...76/&productcode=254076&id=385220

Last edited by Vegas6400; 07/08/2013 9:46 PM.

1952 Chevrolet 6400 From the Farm

1953 Chevrolet 6400 HD Pickup Project
- 5.9 Cummins, 6 Speed Allison, 22.5" Wheels