Adjustable upper control arm opinions.

Welcome to the world of classic cars. Most of the alignment shops won't touch something they can't turn out in 30 minutes, and since none of their "techs" know anything about old cars they can't guarantee that.

Throw in aftermarket parts that they didn't install and they just don't want the liability.
Exactly. The same guy that can fail my car for state inspection, doesn't know how to align it. Make it make sense.
There's really nothing about the FMJ spindles that would "work against your set up". Certainly not to create the alignment numbers you're getting.

I've been running the FMJ spindles for well over a decade, with a good alignment they do not create the issues you've been having.
I'm just saying that out of frustration, and I've been in that situation before. Felt like I made an educated decision and wound up being the wrong choice. I'll get it figured out once I reorganize the garage and get my car in there.