I think its been mentioned... If you are considering having it repaired and not demanding the shop replace that block I second the method of preheating the block and welding the damaged area, resurface it then sleeve it. I think it will be good as an almost used/re-manned block. The sleeve would limit the direct combustion heat and pressure from stressing it over time.
I feel the block needs to be put in an oven and welded hot... I'm not sure of the best temp, but I am sure someone knows.
SPEED SAFE, NICK
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