Been there. There are a few different combinations. Big bearing/small bearing. Rotor/Drum/backing plates, OD and offsets and the various thickness of the parts, shims inner/outer seals on the ends, Flange OD/hub OD, bolt circle.. all add up to a pain in the rear..LiterallyI fought the battle on the brakes and the brakes won..
But I found it best to just do the disks in the 1st place and be done with it..I used the Ford explorer disks and found it best to just take the mess to my local guy who does rear ends and have him do it..What he charged me was worth it and saved me a lot of aggravation...:evil:
Your 2 3/8" brake offset dimension sounds right...yeh the axle supplier will need to figure that in. But...considering Ford axles are not equal-length side-to-side like Chevys are so you can't automatically split the flange/flange-minus-pin dimension, and figuring that you don't know where the housing builder put the pinion exactly (Centered? Offset to the side, and how far?) and considering that you'll want the brakes to fit, here's what I'd do, which is either instead or in addition to using the special tool described:i have a third member for it now, just no carrier yet, im building this rear from scratch.. that brings up another question about brakes, a big bearing ford 9 has 2 3/8 brake offset, so is that what i need to include in the measurement? going to run drum brakes for now, may switch to disk in the future, i just dont know what drum brakes i can run GM or have to go with ford or just much easier to go with a ford drum brake setup.. this rear end is going under a gen 1 camaro
I currently have no axles for this rear, factory or aftermarket
Bob.. your right about the tool, I may just get the tool and be done with it