Looks like the Checker Marathon only used the 230 from 1965 to 1968, and then the 250 from 1969 to 1979. Same final year as the Camaro, Nova, and Caprice. Oddly it lists a 2bbl carb from 1969 to 1975, and having a "single carb" from 1976 to 1979? I'm not sure if that means the Monojet for the last 4 years or what, but that does somewhat coincide with the integrated head engines. I once saw a pic of a cast iron 2bbl intake that was supposed to be a Chevy, and never knew what to make of that, maybe it was made for the Checker Marathon?
