Need Help,Tech Question

[Blade1]

Looking for some input.i am running a tall deck 454 bored .030 ,8:1 pistons, isky cam 635 lift , comp moly steel roller rockers, isky red line roller lifters,manley 3/8 hardened pushrods, valve springs 1000# open, 350# closed with lash caps on top of valves, with a 10-71 blower at 12 lbs boost, 2 Gary Williams Carbs,with a 280 hp shot of nos spinning a AA stainless 6600 on the bottle. rockers adust .028 warm, have been setting at .030 cold.my problem is that i have been losing the lash caps from time to time,last time it cost me a cam, thats when i thought i was getting a harmonics problem so i went to the redline lifters and replaced my alum roller rockers with the steel roller rockers. do i need to adust the rockers down a little tighter {.026 cold} or go to a 7/16 pushrods or go to the new tapered pushrods in 3/8, or is something else goin on i am not seeing? any help appreciated.Thanks

[Fiat48]

Why are you running lash caps in the first place? Titanium valves?
That's a little much on seat pressure. Back it down to 260...around there. 240 is all you need on the seat.
Valve lash...remember aluminum heads grow about .004 if you are running them. So lash should be set .004 lose if set cold. Iron head doesn't change much..maybe .002 cold and hot. You need a good .080 wall chrome moly pushrod in that thing. 7/16 not necessary.