Not sure if you've decoded those but here it is if you didn't:

CON4 = Conveyor number 4 of the assembly line

A = January - 5 = 5th day of January - 1 = 1961 model year


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)