they were used in...tow package, civil service package..... and did you also know that chrysler in 73-76 put factory rear swaybars under slant six and 318 dart police cars/taxis ? i once talked to a guy who remembers a town in new york that crushed a fleet of 10 of them in the late 70s.....most were heavy duty slant six 4 drs with all this stuff but there was a couple 318 ones...all were 4drs...