New interface in old version

[Kirsten.Jr]

Is it possible to put only the new version interface in the old version client?
Has anyone tried this?

[markmark11]

Or the number of Inventory and Warehouse Slots. And if possible, the items to be stackable (e.g. Red Stone).

[.G.O.A.T.]

Short answer, no.
As for stackable items you can make any item "stack" Example for redstone: create a 102xxxx ID , give it the action to give 1 redstone.