Head Material

hi, the idea is to keep the cast iron from stress and warpage, by welding at room tempature (70), when you weld with 3/32 rod and weld short distance, that keeps it more stable. then by knocking off weld slag and keep hammering on weld, this will stress relieve the weld and surrounding area. I was taught this method when I was an apprentice pipefitter by my journeyman fitter. I had to weld a water heat exchanger cast iron cap end.
it was still in use after 25 years, no leaks. I have welded blocks, intake and exhaust manifolds, heads this way. I know, the experts say to heat the hell out of it before hand. I'm a pipefitter/welder, what do I know?