And the grey ones,like the one you have, were not service replacement units. I have 3-4 in old GM boxes,linked to the same part number(2 of mine are the complete assembly so different part number) If you look at my pictures, the middle picture shows another Pontiac quadrajet that I was finishing that had the exact same grey/black unit on it.. and it is not painted, it is molded in color if memory serves me tonight.. but I do know without a doubt that silver grey/black unit was a production unit..
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