If you can compress those two lifters they've got some air in them which is not being purged out while running. Do the pushrod grooving, and if the lifter cup doesn't have the bleed hole in the middle, put a groove in the side of it like the blog mentions. The lifters have to be completely full of oil to work properly.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!