yer have got verniors but i can't be sure there right i'm going to send the head to cylinderhead developments, have it fully flowed and ported a new bd14 inlet and a new bd10 outlet, and he said he'd give me detailed instructions on how to dill them in, i don't think anyone round my way can really do but they say they can and take you money.!! best job when you do it your self!!!lol