A-Body Frame/Body Jig

A question I have for all the "former drips under pressure" is how much frame rail/body twist is tolerable for an a-body street car. My 67 Barracuda vert was tagged pretty good in the passenger side before I inherited it. I had the frame "straightened" at a shop, but I notice that when I have it up on jacks, completely gutted (no engine, transmission, k-frame or interior, that the drivers side frame rail is off the jack by about 1/2 inch. Doors, trunk and hood open and close fine, but before I weld in frame connectors I want to know if further adjustment is needed.

That would be your call for sure. I think that is a tough question. Are you able to visually detect that "twist" in the unibody structure when comparing levelness of rear of car compared to front? On front end alignment, can or does it fall within spec? Are door gaps visually acceptable? If all that says OK it may not be worth the effort to fix IMO.