So the rear drum face on the very outside where it protrudes out was also hitting on the rear face of the wheel where the stamping folds in the detail. I had to mill off almost a 1/2" from this area to clear. These wheels are 3.5" backspace are are the absolute MOST you can go with a reversed wheel in the back. Any more and the fins would hit the inner step. Again, maybe Joe will chime in at some point. But for now this is all I know about the wheels that I received. Sure wish I would have trial fit them before powder coating. I did find some paint that was an almost perfect match to my powder coat though so after milling and deburring I hit the bare metal with some paint.