Bart 15x10 Steel Modulars with 3.5\" Backspacing fit 14bFF w/disk! Just for those out here who are looking. I just mounted my Bart 15x10 Steel Modulars with 3.5" Backspacing to my 14bFF with the Eldorado caliper disk conversion and it fit without any grinding with plenty of space. They can be ordered from http://www.summitracing.com with 4" or 3.5" backspacing (8x6.5 lugs). I'll fit one on my Dana60 tomorrow and see how much grinding is needed.