gasman, you are talking about some completely different kind of business than I am thinking of.
I am talking about putting a max $20,000 into a car, jigs, and welding equipment, building one in my own garage, selling it, and building another.
Every one would be converted the same way with a single formula and two or three options, which is why I would stick to Hondas exclusively, and set up deals with suppliers.
The result would be something like this:
Bob Bath's 1992 Honda Civic DX Sedan