Working on this 90 YJ is getting tough. I have found that the body mounts are all bad. The sub frame that runs allong the underside of the body is rotten. this sub frame is where my body mounts are and they are rotten. Replacing floor pans is simple but this may be my bigest challenge yet. I think if I get some tube steel and take out the old sub frame I can re build the sub frame with the tube steel (2"x1"). Does anyone have a better solution? Advice would be great.