I just got my set of o'l camel hump cast iron heads back from the machine shop today having screw in studs put in and as i was about to set them on the car i saw that one of the rocker arm stud boss's was cracked at where the stud screws in the boss from what appears to me the hole was drilled to small then tapped and caused the metal to crack. The shop was closed when i called up there so i decided to go back home and clean up until tommorow. So i was wonderin if any one would know is a about 1 inch crack from the top of the milled boss down into the head a repairable one. If not what should i do.