This is something I am looking at doing on my Eddie headed 360. Every time I have torn this motor down I have had good oil pressure etc, but the bearings never look good. It full time oils the rockers and I have it unrestricted and I think my next inspection I will restrict the oil up top and give that a shot. I have always liked all the oil up top because its a street car and I do drag week with it and the valvetrain has always been happy...but bottom end not so much even though I never see any issues on the oil pressure guage.