Hi, I have a 1969 Camaro Z/28 survivor with 36,000 original miles, matching numbers with all it original date code parts except for the fuel pump. My car is a June built car, and I need either a May(EI 40669) or June(FI 40669) Delco fuel pump. I have been searching for sometime now with no look. My question is did they produce pumps every month in 1969, cause it seems like I’m either coming across January(AI) or July(GI) and nothing else.