First of all I have watched your videos. The oil pressure response is what tells me something , not the actual number. I don't like what I see. You have an oil plug missing (best case scenario) or excessive main bearing clearance. The way it lags behind RPM changes is not a good sign. It is probably gushing oil around the lifters as rollers are usually -.001" smaller which is quite a bit of area but the way it responds is the tell tale. Good luck. J.Rob