I put the front and rear xtra-10 on my 91 RXL. What a ride!! Some things to make the switch easier: Get the measurements from the driveshaft opening to the first mounting hole on the donor sled, as well as the measurement from the first to the second mounting hole. Make sure that your measurement down from the top of the tunnel is the same. I used the rear mounts from the donor sled, but drilled through the plate in the front. If you are going to do the front suspension as well, make sure that you change the sway bar, and trailing arms. On the xtra-10 the sway bar is longer, and the trailing arms have a cut out for the shocks to travel correctly. Oh yeah, while you have everything apart - i'd reccomend changing the driveshaft bearings, grease up the shafts in the rear suspension, check the tie rod ends, and have the fox shocks rebuilt (if time and $$ permit).