I burned up a bunch of them in the 511. The Indy rocker arms don't supply enough oil at 600lbs over the nose. I ended up going with a set of Comp pushrod oiler roller lifters and custom Smith bros. pushrods.

1.41/6.46/10.15/135.60 3650# http://www.soundclick.com/bands/default.cfm?bandID=938869