Sum is correct. Studebakers are pretty well known. A photo of a stock '55, a sales brochure or anything of the kind will do.
The issue arises when we are looking at a lesser known vehicle. Some classes require a minimum of 500 produced, some classes require a minimum of 50 produced. Documentation of these figures are yours to research and provide. We will no longer do the research for you. If you do not have adequate proof you will not have a record. Photos of the un-modified 1973 Whatisitarri are also needed so that we can see the changes made.
The easy days are over,
DW