I posted the other day about my 71 Chevy that wouldn't shift into third - I have fixed the problem, it was the modulator valve.

next problem. when removing the old modulator i snapped the bolt off .upon using an easy out i snapped that off into the hole i drilled for the easy out. now the modulator is being held in by a small set of c-clamp vise grips .any help would be kindly appreciated on how to remove the broken bolt withou snapping off the mounting "ear" thanks