Carl, your right about the "center bolt" not being center. I THINK its off about 1 1/2" but my memory is fading and my notes are buried somewhere! I have read here that some folks just flip, or reverse, the leaf springs and that will center it up.
...this will probably confuse some folks but the bottom spring leafs are not stacked centered. If you reverse the entire stack of leaves then the bottom leaves are off set more to the rear. I turned only the top two springs leaving the others "stacked" the way they were which helps to prevent wrap-up.
In the end I had to move the drive side 5/8" to make the driver side wheel centered in the wheel well. These old trucks were farm trucks, loaded heavy, crossing terraces and the frames twisting and bending. Just get it where you like it and go from there. Good luck.
