Oil pump.... reuse or buy new?

My wife would reply who's car ? She learned how to drive in my 67 fastback with big block and 4.56 gears way back in 1981. lol where do you think I got all the money to throw into it over the years. WHO'S CAR !!! ?
Haha my wife wants a 57 belair that's the only classic she really cares anything about. Some day I will build her one.