[BIG BLOCK JIMMY]

I can't find a post for this referring to new springs and not a lowered truck. I had all new skyjacker 4" lift springs installed on my 1972 Jimmy 4x4. After the install I found the ORD heavy duty shackles and attempted to install yesterday. I did not loosen any bolts other than the rear shackle bolts after I relieve the tension on the springs.
Everything appears to be correct/centered and I measured the frame, axle and everything I could think of to see if something was bent. I also played around with the jack stands and floor jack to see if it was just the way I had it lifted.
The greaseable bolts are too SHORT too, but that's another story.
Any help would be greatly appreciated