Shimano FC-M780 cranks, momma doesn't even love them

First and foremost these work just fine. No creaks, no groans, no problems. WWWWEEEEELLLLLLLL. . . . . that's not entirely true. They look like some amateur trials rider used them on some boulders on a job site he may have been showing off to his foreman to prove his worth. I mean this set looks like my spouse threw them in the dryer with some broken Mason jars just to see which was tougher. The important part is that they still are hoping to spin again.

175mm arms.
104BCD
68/73mm bottom bracket shell.