15 stock wheels cpp rear disk brakes

[vweater2001]

Okay guys I’ve searched the forum and haven’t been able to find an answer. Currently have a 12bolt rear end that’s not on the truck and converting to rear disk brakes. The issue I’m having is that the stock 15” wheels 5x5 wheel pattern will most likely not work on the rear and disk brake set up. I want to use these wheels as I just got new 255/60/15 whitewall tires mounted and going for a rat-rod look. I’ve tried using a .5 wheel spacer (not adapter) but don’t think that will help the wheels clear the calipers. I don’t want to have to purchase different wheels, any ideas?

Thanks in advance guys.