What model is my 30/31 frame?

[rotorwrench]

The change was made to accommodate the new cowls of the slant winshield cars that started first with the Victoria and then Fordor models came later. The 68C Cabriolet had a wood body sub-frame so it likely used the older type frame. The Tudor sedan was unchanged. For the most part, the model A frames are close enough that they can be altered to fit any year or model. Holes can be welded up & redrilled as needed. The only caveat is that the frame is the last resort for title and registration purposes due to engine changes and the like. Changing it could be problematic. Rusty frames can obscure the original numbers of a frame but some forensic type procedures can bring them back up for verification.