Sub-frame connectors

40+ years and gravity will cause a unibody to sag.
If a car is completely apart and on a rotisserie all the body panels will be realigned eventually anyway.
If its all together and on the wheels when the connectors are welded in, where it is at this time is where it will be.
Could 4 stands properly placed allow the engine weight and differential weight to flex the unibody back to where it was OEM ? I don't think so.
It wouldn't take the sag out of the A-posts but then a rotisserie setting wouldn't either.
In the end, the purpose for installing subframe connectors is to stop the flex and continuing sag. I don't think there is a way to get each individual car back to where it was 40 years ago. We already know every one was slightly different anyway due to lack of strict tolerances and/or production methods that were used.
Chrysler did give is adjustable torsion bars instead of coil springs to compensate for suspension variations and a huge fudge area where cowl, hood, fender, and door all meet.
So what is the best way to add subframe connectors ? Who knows. Rotisserie is as close to "back to square one" as we can get. Or should I say "OEM un-square one ?"
What is the most wrong or incorrect way to weld in subframe connectors ? I think bumper jacks on 4 corners is about as wrong as we could get.
Anything in-between those 2 methods is "geter done" acceptable. Adjust body panels and suspension as needed afterwards and happy moparing.
To make rocket science of it leads to headache , not happy moparing.