The pics are of the head studs. The threads look like they had pliers used on them before I got the boat. Are these good enough that I can run a die over them to clean up the threads and carry on ?
The second pic is of the thermostat cover studs. On the right hand one there is a groove about 1/2" long on smooth body of the stud. This looks to be the area that would sit in the sleeve of the thermostat housing. So would it be ok?