Do not 3 point motor mount (engine/bellhousing/transfer-case), your hot riveted frame is way too flexible and will rip out some of that motor mounting when you get into off camber off road terrain.
Know that using this mount does not stress the transfer-case, the case keeps it's strength, the mount keeps it's strength, then when you bolt the two together they support each other making each other stronger- - -very simple engineering theory.