[westofb]

I don't think the supports are all that different, well as far as fender mounting goes. The 67-68 differ in the fact that the headlight buckets mount differently (closer to the support) and they have the captured nuts along the leading edge at the bottom of them for mounting the splash shield of the grill. They do use different mounts where the support is attached to the frame mounts. I was just thinking aloud, maybe there are bigger differences in them than what I pointed out, I am sure someone will correct me if I am wrong.

If I were you, I would get a 69-72 support an use it to be on the safe side. Good luck.