66 Cuda carpet question

Place the carpet in the inside after removing the front & rear seats and any seatbelts/console and edge trim where carpet needs to tuck under. The carpet should fit pretty well as it is molded to the shape of the floor pans.

A good trick to use for making holes for the seats and seatbelts etc is to go out and buy a cheap disposable soldering iron. Then use the iron from under the car to melt the carpet for the holes for the seats and seatbelts.