I believe it will. I remember reading that a fixed stock Polish Tantal uses the type 2 wood but stock if you want to be "correct" ( even though no fixed stock Tantals were fielded). So I'd assume milled and stamped furniture should all fit the same.
Sorta works. The milled is singe left side locking with the downturn angle. The right side locking holes in the receiver will be exposed.
It may not lock closed as the angle of the stock is downturned on the milled vs straight to the receicer line on the AKM double side locking.
It can be made to work depending on your build skills etc.
The Tantal is not an underfolder. I think you are thinking standard AKM rear block vs underfolder as OP is asking.