Hey guys and gals

Sitting here thinking a bit, as I have read a lot around the forum but still would like some definite answers..

What would be the best way to port a A12 head?
How high can you go/how thick is the walls?

Its for a street engine that will be raced once a while, but have just read so many different things..

I'm thinking a little about just raising the top a bit, and letting the bottom be as is.
Maybe doing something like what D suggests here, http://datsun1200.com/modules/myalbum/photo.php?lid=1777 , with makeing a D?

Or is it better just to get a A14 head and call it?

The motor is going to have a SC12/14 I'm thinking. Might go turbo if I can get i approved by the DOT in Denmark

Chears
Toby