I think you may be in for a surprise after you get the head done. Often a new valve job on an old engine will increase compression and the rings will start to fail. Good luck, though.

The best way to clean pistons and combustion chambers is to drip water down the carb throat with a mister (so you don't overdo it) while the engine is warm and running at fast idle (1200 rpm or so), just enough to make it drop the RPM a few hundred. This steam cleans the whole thing and is almost as good as nitrous for cleaning the carbon out.


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