Speedway sells a conversion kit for the rear axle, although if you plan on sticking with your stock 10.5 rotors up front it looks kinda goofy as the kit sells you 11 5/8 rotors, the same rotors off of camaros. The way I went about it, as I am on a budget, was I bought the bracket kit and modified them so I could run 10.5 rotors, the same rotors used on a 79ish olds toronado. I also used toronado e-brake calipers. If you go this route u will have to mill your axle hubs down slightly as the toronado rotors run on a slightly smaller hub. It wasn't a big deal for me as my car was completely apart anyways, but if your car is together, sometimes the cheapest route isn't the easiest route. Do alot of people run into clearance issues between the caliper and the frame? I am happy with my conversion... but i am running into a clearance issue between the e-brake arm and the frame and am not sure how I feel about notching the fram and replating it as it is already pretty narrow the way it is. Any input would be appreciated.