Still love my car but......

You can heat the bolt up with a torch, and put paraphan wax on it. The wax finds its way into the threads, and then give it a smack with heavy hammer. I watched a machine shop do this for me on a stubborn fitting in a manifold. Was amazed at how easy it came out.


I also would not recommend using rtv on any bolts in a motor.
Not going to go into why, but a simple google search will set you straight.
Use a thread sealant (Permatex, ARP) which is made for this application.