What was the meth hole originally filled with? Maybe you could get a bung and plug welded to it in case you want to add meth later?
where coudl i get it welded and how much would it run me? ah just read about JB weld, will try it out thanks guys
Use a bolt with a rubber washer/gasket on both sides. I would also suggest drilling the bolt and putting a small cotter pin through it so the bolt cannot get sucked in. This would be the best way because you know at some point you are going to get Meth injection Because of my paranoia of having the bolt pulled in I would be even less inclined to use JB weld by its self to fill in the hole.
how large is the hole ? HOw thick is the wall (hole) ? JBweld a dowelpin is good but if you want to use it next time maybe its a good idea to use a sealing bolt instead (if you have acess to the back side of it. Sealing bolt has an oring that gets pressed in between the bolt head and wall of the IC and the threads are outside of the IC and you can bolt it tight