Awesome truck!
I had a a similar setup on my 86 and I believe the general consensus is to do away with the blocks. Ultimately, the axle housing on mine got stress fractures due to the blocks causing axle wrap so I ditched them.
Now I have OME rear springs with 5” TG shackles & OME shocks. This is a bolt on setup. I’m happy with the way it turned out because it works with my 3” TG front SAS. Others might be able to give you other solutions.
