I took spring down by backing off u-bolt nuts to end of u-bolt. Then I was able to see the boss on top of the spring that is supposed to go into the spring perch to locate it. Problem: no corresponding hole in spring perch. I guess this is not the correct rear end for this car.
It looks like this spring pad is an adapter of sorts. I looked it up and it's an Energy Suspension universal type application.
I don't know what else to do but button it all back up and make sure the u-bolts don't get loose again.
Here are some shots.
looking up above spring
closer shot of perch with no hole
mystery rear end
