Re: crack
Several ways of doing it and depending on if itīs in the middle with surrounding material or at the edge.
Welding an ear or the edge of a bellhousing is fine as long as the material can expand/contract.
Pinning in the middle is fine with tapered pins only.
First you have to analyse what forces will be at work then select way of repair.
There even used to be sleeves for the valvepockets for the flatheads.
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