[RALLY]

My water pump on my 72 Nova SS has a casting number of 6263701 and a cast date A-8. 1972 Chevy added these long style water pumps and according to online sources the casting number 6263701 was used in 1972 to 1975 year frame. My question to everyone is the cast date A-8. This is where i am confused on. My guess is the A stands for January and the 8 is January 8? There is only two letters cast here, A-8 with no year number. Did Chevy not cast year numbers in some water pumps? Again i am thinking i have a correct water pump with the casting number 6263701 which started in the 72 model year which my 72 Nova is, and then A-8 is for January of the 8th day on January? My Flint 350 engine assembled date was January 27th of 72. Do i have the correct year pump? Have you ever seen this before with two cast numbers?