5C or 5D. Email me directly restore@TimLea.com
For your information, the original Holley's are not dated like 5C or 5D but 53X or 54X. X is the week of the respective month 1-5.
Texas Swede
Yeah I was just thinking later holleys, so 53, not sure they made any 54, Id be interested in any dated prior to may 65