Damn son.....WTF does that have to do with blocks? I'm assuming it's a D35 which will spin....period. Blocks don't do anythng to increase the force or leverage from the pinion to the axle tubes, which is what causes the pumpkin to spin on the tubes. Gawd, I wish people would stick to talking about things that they knew about. BTW, I run blocks in the rear, always have, so does that mean I don't have the equipment to fix it? I swear.......
To fix it, put that side tire up against a rock and put it in reverse and give it some gas, while a friend looks underneath to see when it spins back into position. Then weld it up. We've done this numerous times on the trail, and at home. I spun my front back one time by driving as fast as I could in reverse and hitting the brakes hard a couple of times......it went right back, and I welded it up.