Only 248 Charger hardtops were fitted with the 400-4v big-block and a four-speed manual transmission, and not all of them ...
It's Easier To Find One Of 212 HEMI 4-Speed Dodge Chargers Tony explains that the 1968 Dodge Charger R/T 440 4-speed is hard to find, and it isn't because they didn't produce many of them.