I have a confirmed stud breakage on a GT350. The member can identify himself if he wants but here's the proof. This car has been driven at 13 track days. The manual states the torque specification is 150 ft lbs + or - 15 ft lbs. Torquing to 135 is within spec and I'm not going beyond that on my car. The good news is Ford Performance and ARP have finally released longer and stronger wheels studs with nuts to match so that should solve the problem.
@Moto
@tim
@Moto
@tim