Okay so I hate lift blocks, I guess I work the truck too hard in the fields and kept breaking leafs.
Like so.... yes yes stacked blocks but almost all the cheaper lift kits require you to stack blocks now. That's what many many people run with no issue, this was a Rough Country lift.
Garbage, hated that setup from the day I bought the truck but I had other issues to deal with first.
Then a few months ago I bought some used Superlift 5" springs that were less than a year old, and PMF's 4.5" flip kit. Put all that on with a 4° shim and a plate to relocated the axle back 1.5".
This was much better but I had two problems, an increase in axle wrap and since I have a ceramic clutch it was very annoying, and then two days ago the center pin broke on the drivers leaf. The combination of the relocation plate and the shim is no good, again a lightly driven street truck would probably have no problem, I was pulling on a stuck tractor digging through frozen clay.
So now I have gone super beefy...
3/8's top plates, 3/4" U bolts, 8" long spring perches, and I drilled the springs out to accept a 1/2" center pin bolt instead of the 3/8's bolt the Superlift springs had.
First drive was a huge improvement, no more hop on takeoff, way smoother shifting, and much more solid feeling ( although that's probably in my head).
I will say anybody running Superlift 01-179 springs, ditch the bushings and put some poly ones in, the Superlift ones are useless.