Help to identify, Wheels,rear drums

My buddies newly acquired 67 barracuda came into my shop with some strange combination of parts. Looking for all your wealth of expertise to assist in identifying these wheels and rear for me. I am also trying to identify what this rear came out of. The drums are a little different than I am use to seeing on an A Body.

First,the wheels are 17x8 with a 4.5 inch back space. The lug holes are large. I am thinking late model Jeep. The rear wheels needed the spacer pictured so they will not rub the springs.

Second, the 8.75, 4.5 bolt pattern, rear drums are 10x 2.5 with a 3.5 inch back space from the axle flange to the back of the shoes. Flange to flange is about 51 inches. Seems strange to have this combination on a 67.

Any input is welcomed.

thanks