A week or two ago, there was a discussion here about welding cast iron techniques. It should still be posted, and readily found.[several techniques discussed] However I can tell you from personal experience, I had a 429 block with a crack in the cooling jacket, only on the external side of the block. The welding expert[because I don't weld] told me that the preferred method of welding any cast block, was to heat the entire block, not just the area to be welded. He claimed that this would result in less warping of the assembly, requiring less possible machine work after it cooled. The area where you are discribing, may cause some warping, especially if the areas of concern are heated individually. The warping MAY effect the alignment of the cam bearings. IMO, if you try to have it welded, be sure the entire block is pre-heated, [your welder person will determine how hot]and be sure your welder person is very experienced with cast iron repairs. I am sure there are others here, who will jump in with their own "take" on welding cast iron blocks. Take it all in, and GOOD LUCK! Dean
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