I did some research on the carb itself. ItÂ’s a Holley 4160 list # 3918 date code 3 2 8 which is March 2nd 1968. Its size is 650 cfm. I contacted the Holley website with the list number (printed on the drivers side of the air horn) and they got back to me a day later. Great service. They even gave me the rebuild kit part #. Holley also told me the carb was originally on a 68 Chrysler 440 engine, which makes sense given the date code.
3918-1A 68 440 CHRYSLER
3918-2AAS 68 440 CHRYSLER
3918-3AAS 68 440 CHRYSLER
3918A 68 440 CHRYSLER
