Originally Posted by PeterRST
had no oil pressure in the beginning (guess the piston rings were jammed somehow as it has been standing around for years)
Just for your information, the piston rings won't cause low oil pressure, just low compression. A stuck oil pressure relief valve will cause low oil pressure as will the fact that if the car has sat there for such a long time, the oil pump may have drained off. The resulting air lock could have took a while to move...