Long valves on W2's with .600 lift?

So I'm thinking of cam lift around .600-ish. I have a cam recommendation request sent to Jones and Howard's. Jones because his stuff is good and Howard's since they are local.

Howard's has a nice grind with .599/.619 specs on a 106 LC ground on a .904 friendly core. Not a catalog item anymore but it should be available on a special order. I may order two cams and make a switch on Dyno day.

I weighed some valves this week...all 2.02 in 4.90/5.140/5.165 lengths (what I had on the shelf).

The 8mm stem Magnum valve is 120 grams. The 11/32 stem is 125 grams while the 3/8 stem is 140. I thought the 8mm would be much lighter...I'd use those but the retainers and locks are more expensive than the others by a bunch...at least in the tool steel or forged steel lines.

I guess the 11/32 wins.