I think welding is out of the question, without possibly trying on a completely stripped case. Too much material drawing away heat, I think, would make a weld job "iffy" at best. I do have a nice TIG machine, but never tried aluminum yet. Just kicking things around. 2005 that has to be split to fix shifter, 2013 with broke mounts. Guess I just have a pile of spare engine parts huh?