The MC-7, based on the shorter MC-5, was designed to replace Greyhound’s Scenicruiser fleet which was averaging nearly 14 years old in 1968. The MC-7 was built concurrently with the experimental MC-6.
During its production and Greyhound operating period, the MC-7 represented the current state of intercity coach design with three axles, 40-foot length, and a high seat platform, allowing for substantial underfloor luggage space and absence of wheel-well intrusion into the passenger floor The MC-8 and MC-9 which followed in later years did not change this configuration but rather refined some of the details and updated the styling. Some 2,550 MC-7s were delivered over six years of production.
Information from the Bus World Encyclopedia of Buses – 1988