67 Barracuda spare tire well question

Trailer hitch is correct Close them up. The small holes on the side were probably for a bracket to hold trailer harness that was under chassis. They would run them down through the gas tank sender wire grommet hole. That looks to be a late 67 car It has the dual vertical strap mounts which is a good thing. Easier to fit Dual exhaust. Could be a late 383 car