leans hard to right, ideas?

[JesseA422]

so i picked up this basket case 76 swb last year, and have been building it up over the winter. PO put on drop spindles, and 2 inch drop springs. guy also installed drop shocks. rear has a flip kit. it appears to have a hard lean to the passenger side. i have done quite a bit of investigating and i think it is in the suspension somewhere, not a frame or body issue.
the truck had an alignment after drop was installed, before i bought it.

the shock eye to eye on the passenger side is about 5/8" less than driver side.
driver side is 11.625, passenger is right at 11".

springs are fully seated in pockets on both sides.

any ideas where to look next to find the culprit?