If it is close to a comp coupe, I would guess fascia, hood, front fenders, rear fenders, rear hatch/trunk, rear bumper, roof, and add a splitter and spoiler. You would also have to add framing to extend the rear of the car. Because of the wider stance, may have to change the wheels to a different offset.
Close. The project is being performed on a convertible with our removable hardtop (panel kit will be available for a coupe as well). Every panel is changed except the hood and doors. Track dimension is changed using longer wheel studs and spacer like the comp coupe. Rear of the car is not "long" like the comp coupe so no need for custom framing. Rear end is based on the production coupe with wide comp coupe quarters.
Jeff
Glad to hear it, looking forward to seeing the whole package and you are to be congratulated for stepping up to do this. Big investment in time and money I'm sure.