There were a total of 11 cars and racers/teams in the Wacky Races, as follows:
-Car #1 - the Slag Brothers (Rock and Gravel) in the Bouldermobile.
-Car #2 - the Gruesomes (Big Gruesome and Little Gruesome) in the Creepy Coupe.
-Car #3 - Prof. Pat Pending in the Convert-a-Car.
-Car #4 - The Red Max in the Crimson Haybaler.
-Car #5 - Penelope Pitstop in the Compact Pussycat.
-Car #6 - Sgt. Blast and Pvt. Meekley in the Army Surplus Special.
-Car #7 - The Anthill Mob in the Bulletproof Bomb.
-Car #8 - Luke and Blubber Bear in the Arkansas Chugabug.
-Car #9 - Peter Perfect in the Turbo Terrific.
-Car #10 - Rufus Ruffcut and Sawtooth in the Buzzwagon.
-Car #00 - Dick Dastardly and Muttley in the Mean Machine.
-Car #1 - the Slag Brothers (Rock and Gravel) in the Bouldermobile.
-Car #2 - the Gruesomes (Big Gruesome and Little Gruesome) in the Creepy Coupe.
-Car #3 - Prof. Pat Pending in the Convert-a-Car.
-Car #4 - The Red Max in the Crimson Haybaler.
-Car #5 - Penelope Pitstop in the Compact Pussycat.
-Car #6 - Sgt. Blast and Pvt. Meekley in the Army Surplus Special.
-Car #7 - The Anthill Mob in the Bulletproof Bomb.
-Car #8 - Luke and Blubber Bear in the Arkansas Chugabug.
-Car #9 - Peter Perfect in the Turbo Terrific.
-Car #10 - Rufus Ruffcut and Sawtooth in the Buzzwagon.
-Car #00 - Dick Dastardly and Muttley in the Mean Machine.
The show was inspired by the film The Great Race (1965). Natalie Wood (playing Maggie DuBois) became Penelope Pitstop (even wearing the same pink racing outfit). Dick Dastardley was based on Jack Lemmon's character Prof. Fate and Dastardley's sidekick Muttley was loosely based on Peter Falk's Max Meen.
The members of the Ant Hill Mob, in car #7, were Clyde (the leader), Ring-a-Ding, Willy, Rug-Bug Benny, Mac, Danny, and Kurby.
This was one of several cartoon shows canceled during the late-'60s/early-'70's (Hanna-Barbera's Fantastic Four (1967) was another) due to parental protests about excessive violence in children's programming.
The racing cars' license plates were HB and the number of their car (ex Dick Dastardly's was 'HB00'), the HB standing for Hanna-Barbera.