360 hydraulic lifter valve lash

just taking a minute to thank you guys. i think i will rip off the intake and put in some new "small block" lifters and see if that changes any thing.

the engine has never misfired and the plugs look normal, so i would think if any of the valves were hanging open , it would be noticable.

with a valve completely closed, new valve train, good pushrods, new lifters, i dont just dont see how there could be any lash. its a mystery to me.