DV - I really liked the suggestion you had on how to build up my 307. I just really dont understand how heads, valves and the cam work i guess. With everything you suggested, would they all just fall into place? Do i need to have a certain size valve? What a bout a sggested valve spring? Im still in the learning process and i apologize if im bothering you, but out of all the posters you seem the most knowledgable. Thank you for your time.