It is fine to install new shanks, hammers, flanges, etc to the top end. If the hammer set has been emptied that is the only solution. One would expect that an 87 year old instrument would not have the original set of hammers hopefully…….
The problem is this;
The action rack or stack is set on top of the keyboard which is set on top of the key frame which is set on the key bed.
How is that base? The key frame needs to be removed and fitted to the key bed at all contacting rails without any audible knocking. Next the key felt in an 87 year old instrument requires replacement as most of the felt will be compacted, perhaps damp at some point previous; perhaps moth infected etc, etc……
Next up would be the key bushings. Again in an 87 year old instrument these would have to be replaced and sized so that the key tracks properly in its travel up and down….
Next up would be the back checks attached to the back of the key lever. In an 87 year old instrument these would require replacement.
Next up is the whippen heel cloth. This item will also require replacement as it will be found heavily indented with wear and age.
Now you have a solid base on which to place your action rack with the new components.
Sure you can do all of the top end work, as you have asked in the original posting.
BUT,
Without a solid base on which to operate those parts don’t expect much difference in the touch and play; oh sure you will have a slightly cleaner sound due to the new felt contacting the wire, not many other changes will be evident.
Whippen? Wippen….sp? who knows…Curtis you can be our whippen boy….Geez I’m so funny…..
Sunny and hot here……. I’m gone……