In fact the CMC SWB makes indeed more sense for sportscars.
When I wrote my book about 1500 & 2800 fuoriserie I asked Fiat to access the production records to see how many chassis were delivered without body (and possibly to whom). Speaking all in all about 620 cars (my records say 622, W... 624), many in military version, would have been a reasonable and interesting job. Unfortunately they refused, afraid that I could have a scrap chassis in my courtyard and was only looking for the best number to choose to make a fake replica...