If you're that far into it, perhaps you'd consider a new air cooled engine. I have a pushrod 200 in my quad, and Midlifekrisis has a pushrod 230. The complete engines are available, and they're not terribly expensive.
IMHO, there's no benefit to liquid cooling at this level.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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