A lot of connections there to move and cause noise. Two cups, two crank arms, two cotters, two pedals. FWIW I have a 1971 Sports Standard that has well over 30,000 miles on it and it has not been babied. It was a daily rider for nearly 7 years. I would do a proper rebuild on the bottom bracket, make sure to file and fit the cotters properly using a press. All of my cottered cranks make a bit of protest when under a heavy stand up load.

Aaron