1940 Frame Interchangeability

[rotorwrench]

I think your right about that. Ford likely made it to thickness rather than gauge. Gauge is only something that we can compare it to and most gauge standards allow for variance in thickness as well. Now if we have to go out and buy steel material to fabricate something, we are at the mercy of the suppliers of that product for gauge or thickness of material available. Ford made stuff however thick he wanted.