Hot Rod Cartoons was put out 6 times a year from 1965-1974. It was along the same lines as CARtoons, and starting in 1966 they had the same characters on the covers. Here are the issues I have:
1965 
1966 
1967 
1968 
1969 
1970 
1971 
1972... SOON
1973... SOON
1974... SOON