I have the same problem with my Concord I built up, I had installed a different fork ( chrome ) & think that may be the problem. I am going to put the old fork back on and see what it's like then maybe pedal extenders. This is the first bike I have ridden that has had this bad of a overlap problem most I can deal with but my Concord is just to dangerous to ride the way it is, I mean if something should happen and my timing is off I may lose a toe or something lol.

Glenn