The 1967 model year saw an increase in specialty market segment that included "the luxurious personal cars, Thunderbird, Riviera, Marlin, Charger, Toronado and Eldorado." The Marlin was made larger and more expensive for the 1967 model year. It was now built on AMC's completely redesigned wheelbase "senior" platform, i.e. the AMC Ambassador chassis. The retooling for 1967 design changes that were mostly to the "senior" line of AMC cars (Ambassador, Marlin, Rebel) cost $35 million. (US$ in dollars) The overall length of the new Marlin's body increased by with more rear seat legroom, as well as being wider resulting in of additional interior room, but in the process the car gained compared to the previous models.