I have a 69 Coronet. My chassis guy installed a pair of 3" inboard spring mounts.

The car is not finished. It's a rolling shell, so it's light. The leaf springs which are pretty arched with no load. My rear hangers are pushed back so far they touch the frame.

I suspect the rear tubes for the swing shackles were drilled too far forward. They are about 2.5" forward of the factory ones. The holes in the front hanger are 52.5" away. Is this correct or should the be dead even with the factory holes?