Very welcome. I tend to think there's no such thing as a "zombie" thread when discussing 30 year old cranks, but maybe that's just me.

Fwiw, I put mine on my town bike -- an old aluminum road bike -- as a 1x8 with a 42 front (big ring position), 11-28 rear. When I mounted them on the bb-7410 (103mm), I found the chainline was absolutely perfect, with no spacers or other modifications needed to get up and down the rear cluster and avoid the common 1x pitfalls, which suggests my copy of the cranks (very well used but with a surprisingly attractive "patina" to them) were likely spread out from multiple prior applications as you noted above. But it doesn't bottom out, doesn't creak, etc., so I'm very happy with it. To make it a 2x, I would almost certainly have to move to a 107mm.

One thing I constantly marvel at is how absolutely dead sexy these cranks are. They have such a pleasant shape and finish to them, and no gaps at all between the arms and bb shell -- from a distance it almost looks like one continuous piece of hardware, which is so, so cool.