Upper control arms won’t fit.

Well those do appear to be 73-76 control arms. And it definitely looks like you spread them a bit with the scissor jack. It's not unusual to have to open up the LCA mounting ears a little bit to get the bushings to slide in, but that's not what's going on here.

Fortunately it looks like those UCA's are in really good shape, so you can probably just tighten them up a bit using the long threaded rod method Bill mentioned. Do that, then inspect them for any cracks that may have developed in the process of stretching them apart and bringing them back into shape.