I don't know for sure about the door jams, but doubtful since the body contours are different. I gotta ask though, what sort of damage are you dealing with that has you contemplating replacing door jams? That's one area that I've never seen damaged, except in a collision that was bad enough to total a car beyond repair.
As for things that do interchange between '67-'68 and '69-'70: Trunklids. Some suspension and drivetrain parts. That's about it.