I am installing a 32 Ford rear axle, with spring behind into a Model A roadster Frame, which had a spring over rear in it. How far back does the crossmember get kicked back to allow for the 32 spring? I am using the 32 rear with a HB quick change which is why I want to change to the 32 rear.
Thanks

First determine where the axle centerline will be on the frame rails and then measure from the center of the axle to the center of the spring perch on your rear. Transfer that measurement to the frame and that is where the center of the crossmember will wind up in order to locate the axles properly.

I understand the concept of it, I just hate to have to reinvent the wheel every time do something. I'd hate to be off by 1/2" due to worn parts, or because i don't have the original axle, so determining axle C/L might be a little risky. I also figured this would have been done many times and there would be a method for modifying the crossmember that was tried and true. In fact I have seen a couple of schemes for adding two 45* pieces to the cross member, but no measurments.

I'm not sure anyone here as actually done that particular swap before. I would suggest you ask that question to the guys on the HAMB. Those guys are into traditional hot rods and customs and I'm sure someone there will be able to answer your question with practical experience.

Be careful when you join over there. That board is MUCH different than this one and they can be a little hard on new people. They are NOT friendly at all to anyone who isn't into "traditional" hot rods. Or at least their definition of it.

Good luck.

Thanks, I'll give that a try.