The caboose

While, on your car, the shift is at near max, I can't recall if, in all the A-bodies I have ever owned over 54 years; if any of them were that much different from yours.
I can't even remember ever seeing it perfectly centered on any A-body car that I've ever looked at.

It absolutely does not affect the alignment on my car.
IMO, there's a reason that apron hole is as big as it is..

If you were to move it, How would you know what part to move? Does the bracket need to move forward? or is the apron punched too far forward? Was there a factory tolerance? What was the spec? and how far off is yours?
What are the advantages, if any, of moving it?
Check your spotwelds from apron to firewall, I bet they're all off line too. Check the welds between the rear floor pan and the fronts. Check the rear shock X-member. Check the T-bar sockets. Just try and install a 1.03 T-bar. Maybe it fits fine on the driver's side, but maybe you gotta drop the P-side LCA to get it in. So you think to yourself it must be the bars. So you swap them side for side, and nope, same thing. So you finally get it in there and force the LCA back up, and when yur done, there are three or maybe four turns difference on the preload adjusters to get the body to sit level. and then you come to find out, that one of the fenders sits closer to the floor; now what do you do?
Where do you stop?
When do you call it good enough?
How many guys saw that offset hole, going down the assembly line and yet, there it is ....... staring up at you plain as day; it's as if the factory thought nothing off it.
The rear was Not immune either;
If you look on the factory drawings, yur gonna see that the rear suspension mounting points have a location tolerance of a full inch. Which is why, on the alignment rack, nearly every one of these old cars, has a large enough Thrust-angle, that it is noticeable to both the driver and any car following.
Back in the day, we called it Dog-tracking, or Dodge-tracking, cuz as far as we knew, all Dodges did it.
Where do you stop?
Chevy had the same problems, attested to by the thousands of dog-tracking Nova's out there, in those years.
IMO, it's just a fact of Unibody cars of the day.
IMO, it's even a wonder that they could keep the tolerances that they did