I've got my 76 lowered on van lower control arms and there is only 3/4" of space between the arm and the steel mount for the bump stop.
I know they are the original springs. How much gap should there be between the mount and the lower control arm?

1976 Dodge Californian 360, Thermoquad, 727 trans, 9.25 rear with 3.21 gears and a sure grip style rear.