I have read the best place to get your oil pressure from is the galley plug at the back of the block near the distributor... I've also used the rule of thumb that it takes 12 psi to keep the lifters pumped up. If they weren't however, you would get some ticking up there you would think. I have the high PRESSURE pump in my 428, but have considered this at times to be a small mistake due to the extreme pressure it does offer. My concern was to keep those big main journals filled with oil. I have to let the engine temperature come up well before I take off 'cause otherwise it'll peg a hundred psi gauge when driven. I leave the driveway at 60 psi or less...It runs down the road at 65...Idles hot at 40-45. When it idles warm at 30 or less, I feel I've got the crankcase fueled up enough to warrant changing the oil. I almost always change it at 1,000-1,300 miles regardless. It may be overkill, but I must say, it is a very clean engine inside. Is there a minimum spec listed where the other information came from?
