Quote:
Originally Posted by sailor15015
I think they're shaving the head to make sure its flat but I'm not sure. Should I install extra shims underneath the prechambers just to be safe? I've got the tools to pull them so its no big deal.
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Install the prechamber and measure the protrusion beneath the surface of the head. The specification is .307" to 331". If they protrude beyond .331" then you'll need the shims.