Thanks to a CABE person for posting the pics, the serial numbers are 3 away from each other, the cranks are double plateau, the reach front and rear are both 2 inches, I guess I could go through the parts one by one but I am pretty sure I would find the date codes consistent, I may not be the sharpest knife in the drawer but I have worked on 70s bikes for a while and I am confident that there is no mashup going on here, the identical builds, the level of patina, etc all leads me to believe this is how the bikes started life, that's my story and I am gonna stick to it, Todd