reading through a few forums, i'm having a hard time decifering if the valve stems need to be "tipped" or not. from my understanding the lash adjusters will compensate for it, so that the followers do not make contact with the spring retainers. So basically the new valves need to be "seated" into the head, with no other technical machine work to be done? next question. how do I obtain 4bbl spring tension on my 1bbl head? is there a spring that is readily available from another application that will slip right in? I know that the 4bbl has inner/outer springs, but i'm not sure how to tell what their combined rate would be. i see that the 1bbl rates are 165-175 @1.233" and 94-100 @ 1.663. I am asking this due to the E or H cam i plan on using with the build.