The Fisher Files 1947
Drawings
The drawings and the model are 1/12 scale. The heavy grid is feet and the find grid is inches. In drawing "A" the suggested wheelbase is 10 inches or 120 inches full size. In drawing "B" it's 8-4/12 or 100 inches full sized on the rear engined version as seen below.
The rear engine configuration could not possibly pass a crash test of today.  The only cars I can think of that's close to this were the forward control, rear engined Volkwagen bus and Corvair Van or Corvan.
Converting to life size:
Overall Length Max           189.75"
Overall Height Min              60"
Overall Width Max              75"
Overall Width Min              72"
Width a Shoulder Min         60"
Ground Clearance Min        8.25"
Tread Enclosed Wheels   55"
Tread Exposed Wheels    64"
Tire Diameter                26.25"
Tire Width                      6.75"
Wheelbase                   Flexible
Body to floor                3.75"
(Drawing "D" is a blank grid for drawing over)