The 65mm will fit & focus on a Graphic, on a normal board, but you will probably get the front of the focus track in the image. So drop the front bed with the standard on the rear rail, fully retracted, then focus the lens by adjusting the position of the standard, you need to be extremely careful not to use the normal focus mechanism/or take extreme care as you can strain & damage the focus tracks.

On my Wista the lens includes the front of the focus track so I use rear tilt, and front rise & tilt to get around this, again I don't need a recessed board, but many cameras do.

I don't have a centre filter but there is fall off at the corners but not enough to cause me problems with B&W, however for colour work it would be better to use one.