1972 FJ40. It looks like I need to move the upper shock mount/crossmember forward about 3" to make room for my s10 tank to mount without rubbing. Anything I need to be concerned about? Is there an easy way to replace the frame rivets without taking the cab off the frame? I heard I should weld it so it can flex some. Also the angle of the new shock mount? just try to keep it the same? I ordered OME 2.5" lift for it, will do at the same time. Any suggestions would be appreciated. thanks in advance! I'm not going to do any xtreme rock crawling. Joe