how are they welded? I've been talking to several people, some say TIG, some say Braze. We have a large oven in the forge at work here, so what I'm thinking of doing is setting the temp high, brazing the joints, then popping the hot manifolds into the oven, turn it off, and let it cool slowly overnight. The consensus seems to be that unless the TIG is perfect, it will crack over time, and the problem with brazing is it tends to crack as it cools rapidly (dissimilar metals). Any thoughts?

thanks,

Ryan