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I have two points about this. The first is that your deck height is kind of high. This engine is a low compression engine so I would run it at 1mm deck height to maximize your compression. The second point is about your valve to piston clearance. Are you measuring at TDC? If so you are not measuring the closest clearance. This is a common misconception. Closest clearance for the exhaust valve is before TDC and for the intake valve is after TDC. How much before and after depends on the engine. I'd measure at 5 degrees and 10 degrees.
With the 5mm number you found, I wouldn't bother measuring at the other numbers. You have plenty of clearance.
-Andy
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72 Carrera RS replica, Spec 911 racer
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