I swapped the doors in my 69 to get the 70 glass, then found out the doors are the same, but that's alright because the 7 doors were in better shape.
The swap is simple, but you do have to do both door and quarter-window glass and regulators. The 69 door windows have the weatherstripping attached to them and the 70 quarter windows have the weatherstripping attached to them. It may be the other way around, I am writing this from memory and I'm getting old. As a result, the 70 quarter windows are about 1/2" narrower than the 69.
The whole swap should take a day.