Rear shock help......

[atm70chevy]

I am in desperate need of some help. I have a 1970 stepside with 4" lowering springs in the rear. I have installed a shock relocator kit from Classic Parts and bought their rear shock relocator kit. I bought some Belltech Nitro Drop shocks and the stud is too big to fit in the bottom bushing. I have called Classic Parts and they say that the stud is the correct size and I also called Belltech and they say the shock is correct. The bushing for the shock is 1/2" in diameter and the stud is 5/8" in diameter. I tried to drill the inner sleeve out to the correct size but I got the hole crooked so now that shock is useless. Can I just replace the bushing with larger diameter ones or does anyone else have a better solution? I tried to include a picture of the shock studs but I couldn't figure out how to get in one here....