If you use studs , do not get the auto parts store Dorman brand . I put some in a 440 cry. with manifolds , one broke , not from over tightening , pull the motor up , removed the manifold , drill broken stud out . bolted the manifold back on , let the motor back down . the next morning , checked the torque , the other manifold had a broken stud , this happen overnight , with no one messing with it . same drill of pulling the motor back up , welded a flat washer and nut on this one to get it out . never seen studs break like that . I will not be putting anymore Dorman studs in anything , high Quality chinese parts . but we are saving money , lol