Thanks for tagging me
@BNielsen.
As others said, it is work to make this work. When dad and I did the swap, the front frame mounts will need to be relocated, the diff. mount will need to be relocated, and the front shock mounts will also need to be relocated. You will need the 3/4 ton upper control arms, but the 3/4 ton lower control arms swap in no problem. Rear axle also swaps in no problem, the easiest part of the swap. It wasn't too hard, just time consuming. But I think it was worth having it over a SAS. The ride quality is better than my 97!
We were finally able to get my 98 leveled! I bought some lift keys for it and I was able to crank it up to 39 inches, the back is also 39 inches as well. We did this when we had to replace the flywheel since the teeth were getting chewed up, when I tried starting it up when the snow finally melted. This years winter was terrible! It is going in an enclosed area this winter for sure. Also put in a corvette servo, didn't feel a difference.
Anyway, I was very happy that the lift keys worked, well worth the $100, and I am not even maxed out yet. Now, we did have the regular keys installed, but when maxed out, it was barely lifted, at all, it sat stock height w/ the rake. With it leveled out, it rides like it was at stock height!
Edit: I talked about this swap here, its a good read
:
https://www.gmt400.com/threads/swap-8-5-ifs-for-9-25.38576/page-2
I suggest reading this whole thread before you continue as I find some changes that had to be made.