Re: muffler gasket blowout
I spent an hour or so with a fine flat file, flattening the mating surface of the 'exhaust manifold'. I had to remove quite a bit of material to get the entire surface the way it needed to be. I used an aluminum gasket and haven't had to re-tighten the exhaust at all.
Time well spent, in my opinion. Kinda gave me the delusion that I was an old world craftsman wielding a tool...........while listening to Aerosmith (I do believe at that time).
You're never lost until you run outa gas.