Brazing too soft?
I without fail I always find it harder to grind then cast iron, unless we are talking about cast iron that has been over heated and turned blue as on flywheels and brake drum’s.
When I have ported heads that have been fixed by brazing I have to use a stone and then sand the excess braze down to level it off with the surrounding iron so I don’t dull my Burr’s.
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I do stuff for reasons.
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