[DeTomaso] carbon fiber rear deck, flat or with ridge down the center???

[Ken Green]

The guy who sold the fiberglass Pantera body on ebay can't find the rear deck (NO, I did not buy the fiberglass body, he's a client).  Turns out he molds vintage race car body panels, so making a rear deck is no big deal.  Question is, if he is going to make a mold, and will then be able to make more rear decks, is it better to make a mold for an early flat deck or a later deck with the ridge down the center?
 
Ken