I discovered today that the new stock replacement gas tank I bought is not going to clear the rear end in my car due to moving the rear end back for tire clearance. I don't really want to hammer on the tank so I was wondering if anyone here has ever notched out a tank in order to make some room between the rear end and the tank? Also, if feasible, I would like to narrow the tank width-wise on one side (the other side is good) to gain some room for a tail pipe. We were thinking of cutting the side of the tank off about an inch or two in from the lip, then cutting out a 3" section of the tank and then welding the side back on to the tank. Again, has anyone here done anything like this?