There Goes The Oil Pressure!

The pan is straight ,but the the car sat for three years before i got it.So first thing after getting it cranked and listerning for noise and checking for smoke i changed oil. It immediatly started tapping lifters,pulled valve covers to find adirty mess to put it litely. everything was oiling good up top so ifgave it adose of marvel mystery oil which stopped the tapping in seconds {i know why they call it mystery oil now},let it idle for about 15 minutes then shut down and drained the crap out. The oil looked worst than the old . So then a stupid idea hit me piour a couple gallons of mineral spirits down both sides of the rockerarms. It cleaned em and good to.thats when it hit me if it cleans this good up top whats it doin down low.Well after wet/rdry vacuuming the gunk off top i drained the elixer out the bottom it was nasty clumps and chunks of build up. pouired oil allin the top put anew filter on cranked up and here we are. Nice quiet smooth runnin 318 with wacky oil pressure