[Dominik]

Speak to your engine builder about maximum piston to deck height (quench area).

If it becomes too big, i.e. by using a thicker gasket, you may experience exactly what you try to avoid: uncontrolled pre-ignition/detonation.

Also, your cam may be perfecly matched to your CR and you lose quite some torque and power by dropping CR. This is a lesser problem.

I feel that recurving the timing is in order once done.