well, looks like wilwood was confused and sent us Ford backing plates instead of the Mopar ones we were going to be able to modify to work. The Mopar ones we could modify to work with the big Ford bearings, but not the other way around. So we ordered the correct backing plates. Cass has them modified, housing is powdercoated, I am just waiting for the bill and a shipment notice. It will be right at a year from the time I ordered the strange bare housing to when I receive the finished rear (assuming I get it within a month). For those of you considering this deal I will say it again. Stick with the 8.75 rear. Not sure if the XV brakes are worth it versus the Wilwoods I ended up going with, but there is something to be said for buying everything from one place if possible.