I have glass from my 69 post car. The previous owner started a restoration by sand blasting the car. He was careless and blasted small parts of the glass so there is some pitting. I bought all new ECS glass. The pitting isn't real bad, from a distance. You are welcome to them if you pay shipping. Or pick up. I'm in NW Ohio. I don't know if 69 glass will fit a 70.
Maybe someday. For now I just enjoy it as it is. Don't have to wash it, don't have to wax it, don't have to vacuum it. I enjoy spanking just about anything that rolls up next to me like any other musclecars, newer Hellcats, Mustang GT's/500's, corvettes, Camaro's and anything else that tries.