I'm measuring for clearance between the valves and the head, before shaving or even leveling any head or deck material...
Valve lift requirements
Valve face above deck:
1.05mm
Cam lobes, open minus closed:
23mm - 19mm = 4mm
Thus, total valve rise:
4mm + 1.05mm = 5.05mm*
*(Disregarding valve lash)
Head ceiling height
Head ceiling above gasket face:
5.7mm
Copper head gasket**:
1.15mm
Thus, total head ceiling height:
5.7mm + 1.15mm = 6.85mm
Therefore, head/gasket height from deck is 6.85mm, minus valve rise of 5.05mm = 1.8mm clearance
**Note the OEM gasket measures 1.75mm. This means installing the copper head gasket (which is thinner, at only 1.15mm) is equivalent to having already shaved 0.6mm (or, 0.0394") from the stock head.
And because 40 thousandths ain't no chump change, I'll figure out compression next.
Once I have the piston installed...