there is no Super Deluxe in the 22nd series - it was introduced in the 23rd, based on the Super Eight. The car is most likely an Eight Deluxe, but could be a Super Eight if it has the 327. The Eight Deluxe and Eight have the same 288 engine, but different trim, including the stainless over the windows which another poster noted. (also door trim differences and different upholstery) This one has the "closed mouth" front bumper.

The hole by the trunk is where the remote spare fill or a second back up light would be located. The hole is rather large for either. I have a similar car, and it had a later antenna mounted there.

mechanical parts are relatively easy to come by. The trim pieces that are only used on fastbacks and convertibles (like the door trim) is more difficult.