[Jim Holden]

Speed220:

I should have been clearer where I was going with this. As I indicated, the orignal small block cars had a track; front 51.5" and rear 52.5" as reported in several magazine articles of the time. Assuming a 6" wheel, I am trying to get to the flange to flange measurement of the original cars and to do that, I have to know the backspacing of the wheels, I would think. As for the various replicas out there, I would think that this measurement could be all over the place given different offsets and different body widths, etc.

Jim