I am only doing the foot well and seat area in our 1970 coupe. I have the parts that I purchased from OSJI in Muncie Indiana and want to know the best sequence of installation. I think the sill covering goes in early. I am not sure if the toe goes in before the sides and the tunnel.
The attached link goes to an excellent web site with interior installation guide. Steps should be very similar for your 1970. I believe page 29D is about where you want to look.