This is what I have right now based on a tracing of a photo of a headgasket.
The cams need to be wider appart to acomodate the cam phasers and thus be larger, this will also make the cams stiffer. Variable lift will be the same as vtec from honda, that is why there are hydraulic tapped instead of hydraulic lash adjusters altho there might be room for them. In that case it will also be easier to go to a 3 stage VVL, the only downside is that the head will have to be a few millimeters higher.
I also ran into a bit of a problem with the outher studs and I am not sure on how to solve this. The most easy way would be to divert the in- and ouletports but this will create a difrence in lenght from the inlet to the valve or the ports al will be on an angle. The later is performance wise better but will make it harder to fabricate in-and outlet manifolds, altho I am thinking of 3d printing the inletmanifold.
The volumes of the combustionchambers are just a roughly calculated without the thickness of a headgasket. I have chosen a compression ratio of 12,5:1 for now. I just wanted to see what i can fit in the chamber and schape it a litle bit.
Let me hear what you think of it, I am always open to improvements/sugestions.