I have some 302 heads on the 318 with hooker headers. I sealed the air injection holes with 1/4" pipe plugs and used the stock shiny exhaust gaskets, and I have some crazy exhaust leaks. I had a real hard time getting to the back two holes on the drivers side, just could not get them tight enough, and had forgotten to seal the end holes too. Sizzle! So, I got some high temp sealant and a few different types of header bolts I'm gonna try, and some mr. gasket header gaskets. My question is, if the leak is coming from the air injection ports around the pipe plugs, can I pack them with JBWeld to seal them good? Will JBWeld take the high temps or blow out?
