I have a 1932 Chevy...rusted pretty bad. I am not going to quit though. I need measurements to get started...anything!? I am probably going to build a wool base to square it up but the bottom is pretty bad. I think "50bomb" had the right idea with starting from the back though.
I have two '32's and one is 68.6 right to left on the floor directly under the dash and 71.4 floor to top at the same location. The other is 70.4 on the floor left to right and still 71.4 floor to top. In brief, one is a bit wider at the floor. One is a Master two door sedan and the other is a Standard four door. Normbc9