So, the Caddy intake has a couple of spots that need to be welded up. I have n't done a lot of aluminum welding on the TIG machine. Basically, there are small holes where the alignment dowels have rubbed through the top. Maybe the size of a pencil eraser. My thoughts were weld it up, buy a new intake gasket to use for a guide to re-drill the alignment hole. I would like to practice on some other things first. What are some of the tricks that make welding cast aluminum easier? So, how would you set up the machine? Don't assume I know. I have an assortment of Tungsten and cup sizes. I have no TIG gas lens. Do I need one? Should I Preheat the casting with my Oxyacetylene setup? Should I bead blast the area first? When setting up the machine, how do you determine how much amperage for something that large? What size tungsten should I start with? I am about half tempted to hire this out, which is something I never do. Should I tackle it? I can TIG weld mild steel, but aluminum is a black magic art to me.