I am interested in changing out a groupset from an older Centurion (1976). It currently sports early Suntour Cyclone pieces including a 5 speed Winner freewheel. I want to change the entire groupset to 1st generation Dura-Ace. The Dura-Ace freewheel is 6 speed and the Suntour Sprint hubs (which are the only items that will stay Suntour) are spaced at 126mm. Since this is a friction setup, does anyone see any compatibility issues or other red flags I am missing?
I figured it may be a good idea to consult the group before starting the tear down and build up. You know, just in case.
Current Suntour Cyclone Setup
Proposed Dura-Ace Setup