I am in the process of extending my wheel base on my jeep YJ. I am running 39.9 TSLs, and have dana 60s front and rear. I moved the front end forward 4" and I am trying to figure out what to move the rear end back to get the ideal wheelbase. Does anyone have any suggestions? This is going to be the wheelbase I intend on keeping, but plan on converting to coilovers in the near future. Please help if you have any ideas.