Can I fix these seized up wheel cylinders?

The new wheel cylinders we got for this 1967 C10 wouldn’t work, so I rebuilt the old ones!

[@bluecordprecisiongrading2504]

Yes

[@OwensGarage]

Haha I finally made a “real” thumbnail! Seems to be half working, I’ve got 19 views in the first hour and a half which is better than normal🤷‍♂️