Hey how are you planning on swapping from swing axle to IRS? I want to do it on my baja too. Are you going to get the jig to weld the pivots on or use the whole torsion assembly from another car? If you are going to cut the back end off talk to "purple turd" on this forum he has the whole back end that he cut off. I was going to buy it but hes too far away from me