First the engine builder wants the 3F-E head which is stock to calculate the volume and compression from there he will if needed open it up.
It seem that to get more out of the turbo it may be better to de-compress the engine, rather than incress it. All this can be done while its been ported and polished.
Big learnig curve for myself here too.
New forged pistons will be needed as well as con rods. Crank I'm told is not an issue cam has not yet been discussed.
Now where is my credit card
I'll take pics of the 3F-E head before it goes to be machined and post up a full list of the modifications and after pics.