Nice love tin grille trucks. The valve cover bolt needs to be fixed pull the cover off use a easy out and remove the broken bolt and replace the gaskets and reassemble. I made that same mistake and it was fatal to my slant 6. I broke a bolt off and just put rtv on it and it was leaking severally and I did not know it until it locked it up! I was 16 and didn't know much about cars. That was a long time ago lesson learned. Good luck i really like that truck
