The crazy thing about the engine without the 3 pipe plugs is it was in my black Duster when I bought it and ran 11.80's with a 510 lift purple shaft hydraulic cam. Matt raced it the year I bought it till I built another engine for it. While idling in the pits or driving it around it sounded like CRAP. From the water box on when it was reved up the pressure must have been high enough to pump up the lifters. The 3 plugs missing and the one that really surprised me that it had enough pressure not to harm the bearings was the one on the rear driver side oil galley. The other two not so must as they mainly direct oil thru the oil filter. Those were the small vertical one located under the rear main cap and the one under the 90 degree oil filter adaptor.