Those studs are meant to shear off. If you replace them with a stronger stud then something else will be damaged at the next weakest point. Transmission on up into the motor. You do not want that. The studs are meant to shear off to prevent more extensive damage elsewhere. Everyone thinks when a bolt breaks, I'll just put in a stronger one. Bolts come in varying degrees of hardness for a reason. You want the bolt that snaps to be the one that will cause the least amount of damage. I'm just saying.