1970 Dart Swinger FINALLY UNDERWAY

I'm not quite sure I follow, but the bottom lines is that it's best to install (bolt or weld) the subframe connectors on the car as it sits with all four tires on the ground. The engine being installed should not matter, since it does not deflect the chassis to the left or right. The majority of the load deflection in the chassis will be torsional during a corner, which is where the frame connectors come into play.

All of these questions, Eric... You should probably try to avoid all of the gray area and just put a 12-point cage in the car. This will essentially eliminate ANY chassis deflection and prevent further questions lol.