When you get ready to install that main floor pan, check my build thread, you will have to measure and drill 2 holes in different spots for where your outboard seatbelt holes. 69 B cuda is in a different spot than the AMD pan is. You will have to cut off the back part of the pan to get it into the car through the door opening. If you measure and cut it right, you can do a non stock seam right on top of the transition pan. Glad to see your going to tackle this.