Okay then.. Still some things to sort out;

1. A A14 head will lower compression. How will this hurt performance? Or does it counter for it by the bigger valves?
2. If I choose to stay with what I got, can my original question get answered, regarding how much and how i should port the head?

Rallytwit, installing larger valves require the head getting the seats maken bigger by a shop, and when it's there anyway, I might as well get it ported by them, right?

All aside I would also be keen to know what I can expect from doing this power wise ? :)

But have sent a PM to PJZ and is hearing him what he want for a head ^^