1. you should be able to use your existing lower ball joints, if you want to check, look up the LBJ part numbers for the Coronet and the Volare on rockauto.

2. again, look up the part numbers or look what the description says on D.r Diffs website for the spacers. I think you do just lose the spacers but I'm not positive.

3. I'm not sure on that one as I haven't looked at the kits descriptions. Dr. Diff I think is pretty good about sending all hardware with his kits.

something else you might want to look at is your brake hoses. most hose routing is cleaner if the caliper is at the front, I swapped some FMJ spindles side to side on my Coronet so I could put the caliper to the front...I'm using slider calipers though.