I have a 1973 Dodge Van, 360 engine with about 35,000 since rebuild BUT the van was not started for 10 years.
Have now driven about 2500 miles in last 5 years and recently oil pressure went from a typical 45psi to 65psi.
I replaced oil pressure sending unit, PCV breather & Valve and changed oil & Filter. Used a oil service type pressure gauge to confirm pressure is really at 60-65psi.
Now seeing some oil on top of water pump and appears that oil is seeping from the valve cover gaskets.
Do you have any suggestions about what might be causing this?