I know how you feel! Every time I do an upgrade project on my Duster I run into the same thing. That’s why my T56 sat on my bench for a couple of years. It’s my daily and when it’s working I want to be be driving it! Smaller projects aren’t bad but doing a big tear down with fabrication is a different ball game.
At least with the 4 link you should be able to go back to the leaf springs pretty easily if you hit a snag. With the T56 and the crossmember and tunnel mods you get to a “point of no return” pretty fast. Since you’re doing an inboard relocation at the same time it basically means none of the stock mounting points for the leaf springs are effected until you take the spring perches off the axle. If you don’t need to do that right away you can just bolt the springs back on.
