Thread: Rear end Alignment

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You missed Bobs point there Calvin. You do NOT need to move the springs at all. On that truck the center "thru bolts" in the springs that hold all the leaves together are FORWARD of the center of the axle. The truck originally had a "torque tube" drive line where the axle had to swing on the top of the springs up and down so the torque tube (a solid drive shaft with no universal joints) wouldn't bind. To do this they put the Thru bolts on the springs FORWARD of the center of the axle housing. It acted like a "hinge" with a pivot allowing the axle to swing.

Your "new" rear and most any other car made has the guide hole for the thru bolt in the center of the spring pads as 99.9% of cars with leaf springs have the thru bolt in the center of the axle location. THUS, you simply need to drill a new hole forward on the spring perches so the thru bolt holds the axle back in the location it belongs.

The drive shaft "may" need to be lengthened after doing this, but this is a pretty simple deal here, don't make it complicated.

Brian