Try setting the seat pressures at 140 to 170 lbs. with no more than 400 lbs. open on your current broken in camshaft and matching lifters thumbs
On your deal those current low pressures are not seating the valves at the upper RPM, especially the intakes tsk shruggy
Let us know your results afterwards please work grin

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)