No, basically the hole was almost exactly above where the tank is now. I didn't have to get into the crossmember at all. I had my axle moved rearward so I couldn't use the shock mount anyways, but if the axle is in the stock location you should be fine. I mean, personally, I would run a new crossmember out of tubing anyways to be able to inboard the shocks a little. (I never even ran shocks on the rear:roll: ) Its kindof hard to talk about this because I sold the rig 2 years ago and went a little different route than most people, so I don't know if my method will work for others, ya know. I was running YJ springs in the rear so I had to move the front leaf mount back quite a bit. Clearances will be different, but with the rear axle pushed back and directly UNDER the tank, I never had any problems with clearances. If I can find a pic of the underside, I will post it. IIRC i had to get into the crossmember behind the one that holds the shocks, but I didn't have to cut it completely out. I hope that helps. Tim