What bolt is breaking? Is it one of the three bolts that mate up to the frame on the GC unit itself? I've installed the GC sleeve over kit with the camber plate and just moved down to the stock spring camber plate without issue so it sucks to hear you're having trouble.
I like the kit itself but it seems to have a fair amount of slop between the plate with the markings and the plate with the pointer.
I play real sports. Not tryin' to be the best at exercising. - Kenny Powers