[Mike C]

Both my Jimmy and my kids have semi-float 14 bolts swapped in from mid 80’s Suburbans. I made a jig to move the perches on mine and used the same jig to do his. Both re-used the factory GM mounts. Both have had the perch redrilled to move the axle back 1”.

I have the original springs from his truck so we can go back with those. And we might. The block setup certainly the least expensive route.

Since I have 2 trucks setup the same way, it is easy to compare what is and what should be. Because the driveshaft doesn’t fit, back of the truck is higher than my truck with 35’s and it’s sitting on 32’s, and the shocks that came with the kit are too short all suggest the spring is wrong. Which is the same experience the OP was having.

I like all springs. I will probably just buy some 2” springs, but may swap the OEM ones back in the truck just to take measurements.