Rear Drums binding.

I just did a swap from small bolt pattern to large all the way around on my car. The rear axels I got from Dr Diff. The Backing plates are from my old 69 Dodge D100 the rear is a 8 3/4 the brakes are 11"x2". I bought the drums from autozone. Well while my car was still on the jack stands and the wheels on I put it in gear and nothing. I gave it some gas and it took alot the wheels satrted to spin but acted like there was a lot of resistance. Took the wheels off and looked at everything cant tell where it is binding at. Is is binding on the backing plate?
My next option is disc brakes. I have been dumping a lot of money on brakes lately. Let me know what is the best route I need to go. Thanks!!!
Author: admin