I recall an article - probably in the Shell Aero magazine - talking about the 614, with a photo taken from the front portside. A few pages later, there was a photo from the same angle of the F-28.
I did a double-take - the cockpit lines (windscreen, etc.) looked identical! For all I could tell, the cockpits of the F-28 and the VFW614 were built in the same jigs!