Thanks Luis. I had a fabricator come out this morning and give me an estimate for my flushmounts. Looks like another $200 to have the boxes made up. I think I'll try my hand at making the boxes themselves since it's only 90 degree bends and the one complex edge is something I can cut with my angle grinder and cutoff wheel. If I fail, I'll just hire my fabricator. I also picked up some Simple Green to clean up the engine bay.