[OrrieG]

I did not have to do anything to the axles, I believe the k20 have the same perches, etc. because I got my K10 ones from a guy that was converting to K20. Part of the deal was I helped him swap mine out and his in, we did it, including transmission and transfer case in 6 hours, except for bleeding the brakes, I had to head back to Boise. I remember the only modification we had to make was for the trans/xfer case cross member.