From what I understand and I cant say for sure because I don't watch him I hear it secondhand but, UTG welded that block with a crappy HF Flux welder. Then declared it a success. Pro welders commented on his video that "as soon as you add coolant it will leak" UTG deleted the comments said he succeeded, but never pout coolant in the block to check for leaks. Now a typical UTG cop out is he will say "oh well I am going to use block filler in it anyway so it doesn't matter...?" Ok then why weld it? This is typical Uncle Tony in a nutshell and i dont see why others aren't catching on. Nick Panaritis a professional, his channel is "nicks garage" he has a similar situation with a 413 Chrysler. He is replacing the block why? he does this for a living and knows welding a cast iron engine block that needs to hold coolant doesnt work.
