Slant 6 rocker arm metalurgy

Well, I have researched it pretty in depth. I have looked at every available shaft rocker arm I can think of and none is close in dimensions to the slant rockers. The deal breaker is always the shaft center to valve stem pad center measurement. I thought I had a winner in the Ford FE rockers. Not long enough. As far as being weldable, I say go for it. They look plenty weldable to me. That biz from RAS sounds suspect to me. If he wouldn't tell you how they got the 1.6, I have to question if they ever did it.