Thanks for the feed back. I am going to try and find someone in the Vancouver area that does spray welding. I wouldn't mind learning it myself, but I think there may be a curve involved. Also, I wonder how large an acetylene tank you would need to have the flow rate for the spray weld torch. It would come in handy to know spray welding, I would think. I bet almost every 235 manifold has some sort of crack on it, no matter how small. I have another manifold that I could use that may have tiny cracks, but I would guess a magnaflux would show it for sure.