It all depends on how granular you want to get. Really there is the Standard Cougar, VIN has 91 in it, and XR-7 VIN has 93 in it. There were initially three body codes 65A 2 door hard top standard interior. 65B XR-7 and 65C Standard with Bench seat. So a 91 could have been a 65A or 65C. All XR-7s were 65B.