ok, just about finished up the rear tube stuff and started the frame notch. i went to the seam to start (really dont wanna go much more than that), and found that i got a lot more room than i thought i would. 15x10 w/ 5.5" backspace and a 295/65R15 only sticks out maybe a half inch more than my old 275 did. got some pics, and that is not the final cut on the rail before boxing it back in. didnt go too crazy cause i wasnt too sure how far i actually had to go.