3 30 9 8 B

I'm guessing the 3 stands for March, and the 30 is for the 30th day, but the 9, 8, and B have me confused.

According to the BOM number, it was used on model years from 1988-1/2 to 1991-1/2. I'm curious to know exactly when it was made.


Gone to the dark side with an LS3 powered '57 Chevy 210