318 Magnum swap?

Had almost 180k, on my 360 Magnum mule . The bores looked perfect, left it alone bottom end wise.(flat cam ,yes hyd rollers can go flat...) Installed a new, NON HIGH VOLUME oil pump. Lit ,like a champ(still have 60 lbs ,oil pressure). I spent almost a year of late nights,researching this very subject. My .02 cents....