A number of minor cosmetic changes were
made to the Road Runner in 1970, similar to those made to all 16 models
in Plymouth's mid-sized lineup. This included new grilles, hoods,
and fenders. To keep prices down, a three-speed manual gearbox replaced
the four-speed as standard equipment. Production was down
significantly (see chart below) from its high in 1969, which was
probably due in part to heavy competition in the muscle car market for
1970, the year that saw the introduction of Plymouth's redesigned
Barracuda and its sister car the new Dodge Challenger.
