80 Intake Casting #

[C4Paul]

I have managed to get hold of replacement Dual Intake Manifold #14014432 with casted # 4/7/80/2 in it. Is this the casting date code? April 7th 1980? What is #2 and what does GM3F stand for casted under the #14014432?

 

[JohnZ]

Yup - April 7, 1980, 2nd shift.