Roll Cages: Chromoly VS. Mild Steel

Locomotion said

Just a suggestion, but if you are going through the trouble of installing a 6-point, for a very little more weight you should consider going to an 8-point with 2 bars running diagonally behind the seats from the main hoop/cross bar junction to the frame connectors (which you should also have). It will help stiffen the entire chassis. "Triangulation" is the key.

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I'm building a Studebaker gasser, the body is very similar to a 67-69 Dart. The car has a full frame, which I just upgraded to 11 gauge steel (V-8 frame from California)-car had a rusty 14 gauge(6 cylinder frame) under it. I was thinking a 4pt halo with a crossbar behind the seats to mount belts to, and two bars off the halo into the trunk(no rear seat being used). I'm 6'5, so I want to avoid crossbars that are in the doorways if possible.