[john j]

Those are fine chevy clutch head bolts. You can find the sockets from Snap on or Matco. I have found that they don't fit anyway. There is so much rust and build up in them. Some people weld a nut on top of them. Some use a Dremel and cut a slot in them for a screw driver. And some"like me "grind them off. If you have not noticed your back fenders should be held on with them also. So are the front ones inside where the headlights are. Good luck johnj