A quick reply about the valve springs before you decide what head you are going to use. Here is a cheaper alterate to spending $1000 on Hyd Roller kit. This is the 306S K12-225-4 solid flat tappet complete with cam, lifters, valve springs, locks, retainers and timing chain for $434.95 or $409.88 from Amazon.com + free s&h. Pushrods part# is 7372-16 or 7972-16. Roller Rockers part# 19001-16 recommended for high lift cams. Here is another 210cc set of heads for you to checkout, same brand as KMJ is selling but with upgraded stainless steel valves. White Performance Detail Description
. Sounds like a better head than what KMJ was selling. Call them with your cam info.