How to Bend Rear Quarter Lip For Tire Clearance??

Jack the rearend of the car up so you get a bigger gap between the top of the tire and the 1/4 then stick a wooden baseball bat in there, lower the car so there's pressure on the bat, put the car in neutral and roll it back and forth, folding the lip.

*disclaimer* I've never done this myself but have been told by numerous people that it works well and is probably the method I would/will use.