Finally making progress on my 68, and was in the process of assembling the 9 inch rear end kit I purchased from Currie. I bought a rear disc conversion kit from Matt's Classic bowties. The brackets that come from the kit do not line up with the 4 bolt pattern on the rear end. So, my question is.. Does Currie change the bolt pattern on their products to "one off" you into buying their kits and brackets?