This auction is for a pair of nice used original GM engine frame mounts for 1964 - 68 Cutlass and F85 with the 330 or 350 engine. GM part number for this part is 404752 for both the drivers side and the passenger side. These are not for use on the 6 cylinder engine. This mount bolts to the front crossmember of the frame prior to engine installation. The rubber mount (NOT INCLUDED) on the engine mates to this frame mount when the engine is installed. Replace your missing or damaged mounts with this nice original pair. Fits like original because it is original.