What color smog pump fan 1972 Chevelle
 

I just bought a dated original smog pump for my 3rd week of March, Kansas assembled 1972 Chevelle 402/Auto.


The seller and I were trying to determine what color fan is correct - I thought it should be black but am not 100% sure when the change from white to black happened. I also understand there are different style fans in addition to the colors.


Any feedback as to what should be correct for my car? Thanks in advance.

smog pump
 

black & I have 1 if needed

Yes there are black with the corners knocked off and black with the full corners the switch was during 72 M/Y if I am not mistaken.