I did a bit of research on welding cast iron. Appears that a NI (nickel) rod is the best way to go. Since it is difficult to pre-heat the whole block, there are ways to use the NI rod to do this.
I am wondering how long the engine ran this way with no issues......from the bottom of the head gasket, it appears to have been this way awhile, as it is "stained" where the crack is, and still no indications of coolant leakage, as there was zero staining on the block surface on either side of the crack. Also considering, the thermo-siphon system is low to no pressure in the cooling system.
Since these are low-compression engines, it may not be an issue to run "as is". This block will be used to restore a B, and it is going to be a "show queen", so it won't get worked hard........
I am going to explore welding it with one of the local welding companies.....
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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