While doing some research on a non-original motor in a C50 grain truck I picked up last year, I have made the following observation. A lot of "technical" information is just copied from one website to another and then claim themselves to be the authority, etc.
Well, I visited just about every Rochester carb ID site and all of them tell me same thing and that the fourth number on my carb, which is a 9 is for 1969. They also say the four digit date code is the Julian date and year. Mine is stamped 3477, which would make it Dec 13th, 1967.
According to everything I read on the innerweb, the fourth number of the carb number and the last number of the date stamp would have to be the same number!
Hmmmm, is my carb a 67' or 69'
So, don't believe everything you read.......
Just sayin,
BaconFarms
1948 GMC 2 Ton 1958 GMC 370-8 1965 GMC 5000 1970 Chevrolet C50