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You'll see many advocate for closer to 1 mm of piston to head clearance, and it's said to improve combustion to keep the "squish" volume lower. 1.35 is in the range though, as you note.
As for accounting for surfacing of the heads, you've done this by taking your measurements.
pocv0 makes a good point about making sure the camshaft is centered in the cam housing bore. As you deviate from factory settings with machining, etc. this measurement will tend to move. I think Wayne's book mentions this, and may recommend keeping the cam within .5 mm of center, or something like that. I believe people do things like stack chain housing gaskets if needed. There may be spacers available too?
Last edited by stownsen914; 04-13-2024 at 07:08 PM..
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