Spring center pins
As I understand it, your new springs were built using the old ones as patterns, and they matched visually (but no-one put a micrometer to them) ??
I don't think it would take more than about a 1/4 inch difference in center pin position to provide clearance rather than interference. As we wrestled the springs into place, we measured to confirm closest to 101 inch and were very close to 101". Would we have noticed/rejected 1/4" over as long as it was closest to 101?? Phil's photos show much more clearance than "just barely clears".
At the time we were more concerned with getting the (apparently too short) driveshaft to match up than shocks, although moving the axle further back (we put it in the further back of the two possibles, didn't we?) would help both issues.
I'm scratching my head as hard as I can, without brilliant answers.
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