Quadrajet Date Question

[72 Cheyenne K20]

Hi guys and thanks for the replies.

I understand the cast dating but wanted to know if anyone has any reasoning for the model cast number to not match the date cast number.

7043 = 1973
1538 = 1968 or 1978

The last number in the date should be a 3 to match the 7043

So, I was thinking maybe they got the date mixed up and it should be 1583 instead ?

Thanks Scott

[Corts60]

Originally Posted by 72 Cheyenne K20

Hi guys and thanks for the replies.

I understand the cast dating but wanted to know if anyone has any reasoning for the model cast number to not match the date cast number.

7043 = 1973
1538 = 1968 or 1978

The last number in the date should be a 3 to match the 7043

So, I was thinking maybe they got the date mixed up and it should be 1583 instead ?

Thanks Scott

Yep, I hear ya, the model cast date and Julian date are different when the carb is a factory service replacement. Meaning the original carb probably had a repeat issue and the dealer installed this carb as a replacement. So, 1538 probably indicates the year this carb was installed, or 1978.