Homemade Spring Offset kit

72bluNblu said
Even the Mopar Performance 3/4” kit doesn’t move the springs by a 3/4”. The front hanger only moves a 1/2”, the rear shackles are 3/4”, and it calls for the spring perches to be moved 3/4”. So it side loads the springs and places them at a slight angle,

Just a note about an idea concerning a proper installation of one of these kits. I don't want to get into the whole argument about how far the front hanger is actually moved (as we all know how absolutely dimensionally perfect these cars were from the factory) but care should be taken to weld the perches to the housing in a way that creates NO SIDE LOAD. If you don't the front bushing can slowly move in the spring and start to rub the hanger (yeah it's one of my mistakes) and also lead to unpredictable response in poor road conditions.
I have taken to using the following procedure - Mount the hangers and shim what you need to make sure that the spring swings up to the rear shackle with no binding or side load with the front bolt in place in the front hanger, set the perches on the springs being careful to let the springs set in a neutral, unloaded way, and set the housing with the center section in place on the perches, put the u-bolts in place and tighten to the point where you can rotate the housing on the perches with effort (so it stays where you put it), set the proper pinion angle, tack the perches to the housing, remove the u-bolts and finish welding. This should result in no side load on the springs even if the springs are at a very slight angle (max a quarter inch over the length of the spring). The perches should reflect that angle if there is one.