well after puring k seal in my motor in a vain attempt to seal the headgasket for a few weeks it proper overheated this morning ,so just about to remove the head ,ive just compression tested and there is no compression at all in number 6 ,so expecting a lot more than just a gasket if i need a new head does anybody know of any tuning mods i can do to the car while its in a thousand bits ie will the 328 head give me any benefit in ythe way of power if it even fits at all ,or anything ideas like that thanks in advance