Re: 87 Mustang 390 motor no oil pressure?
there are press in plugs in the oiling system on these engines under the intake manifold,
were oil is fed to the lifters. i know of someone who had the same problem after a rebuild on a 390 in a 66' fairlane.
high oil press. causes them to blow out, they look like a small freeze/welch plug in a water jacket,
anyone doing a rebuild on these engines, i recomment taping threads and use a threaded pipe plug, a machine shop can also do this while they have your block.