I probably welded and regroud a100 c/s with only one failure.welding the c/s will warp it,then you have to straigten it. Since its the back throw its very hard to straigten so you have to lathe the back flage of the c/s so that the flywheel will run true. this is going to be expensive. I never did a deisel c/s. A good used one with less than  .003  wear would work.good luck