Need suggestions on grinding compressor housing

Just picked this turbo up for my turbo set up, and I dont want to run the flanged discharge on the compressor side. My thought was to grind down the flange as round as possible then have someone tig a bead around it for a nice seal to a coupler…anyone have any better suggestions?

http://i48.photobucket.com/albums/f244/showvic/Super60frontclose.jpg