The oil pump should have a bolt holding it in from the inside. It looks like yours may be broken off or missing, although I can see the jam nut in your first photo. Those outside bolts are supposed to be rounded off so the oil pump bracket isn't disturbed after being aligned at the factory.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
