Are the red accents in a Mach I's seat-backs and carpet mandatory features of the 1969 Mach I, or are there examples of legitimate Mach I's without them? Does it vary depending upon whether the car came with black, red, or white upholstery? I'm curious whether or not this is an indicator of a "true" Mach and how it would be viewed in a concours competition.
According to "The Mustang Recognition Guide", all '69 Mach I's had red trim above the comfortweave inserts on the seats, and red sewn-in floor mats in the carpet but that's the only data point I've found.
(Jeff, I see you answered a similar question last year on shelbyforums.com but it's not clear if your answer applies to Mach I's)