Missing rubber bushings in springs?

Man, are all those U bolts so hard to get off? I had to use a breaker bar for all 8. I don't know if it's all cuz of road grim or what? My right arm is toast!!

The 8 1/4 is open, I think. 4.5" bolt pattern. With the 3.21 gears, the car moved out pretty good. Id just like to get an idea what it's worth, so I could get it on Craigslist, or whatever. I could use the cash :)