I think the stem diameter makes more difference than might be expected. I know Justin's done some playin around with it and come up with some interesting numbers. I guess wanting to get the most flow you'd certainly look into it.
I was bugged about My post on the 3.3/3.8L valves, looked back at it, correction...
the '01-'10 valves are 7mm stems, 1.89"/1.40", & 4.98"/5.04" OAL.
I know the LS valve reference was for the endless SB thread, but anyways......
