Ineed frame tie advice for the '67 fastback please!

I have been reading up on articles having to do with frame ties from Allpar, Mopar Muscle Magazine, Mopar Performance, etc. Some are bolt-in, some weld, some fabricated, some pre made. . .

Currently looking at AMD ties which are weld in. Question for me is, which ones? I am looking to have the car adjusted in some way so that the stress is off the body center, the front and rear sub-frames are straight, level and properly aligned before installation. Where do I find this kind of information? Is it even necessary? Do these ties automatically pull the car back into shape by virtue of their length and installation procedure?

I could see that these kind of ties might just be slapped in, with the sag of the car after 43 years now permanently welded in, so to speak. I would think that anything you did here would affect the adjustments needed for camber and castor, perhaps even exceeding the amount of adjustment built into the front suspension. I was thinking that bolt-ins might be okay- get the frame alignment correct, tighten all the bolts, then weld the ties to make it permanent. . .

What sort of approach would be best in this case? Sure wouldn't want it to drive "sideways" after they were installed!

Gonna make a purchase this week and get the things to the body guys here fairly soon, along with a trunk floor pan. Any thoughts would be appreciated- likewise, any other sources for metal and ties that I could look at before purchasing. Want this to be right the first time- not only for the suspension performance, but for how the doors close, the fenders and hood align, etc.

Thanks folks!

Mike