Not sure on a Chev but on a GMC I always run the oil pump with an old long screw diver shaft and 1/2' drill motor with valve cover off to make sure everything is oiling properly prior to initial start-up. Fills the oil filter too. After a minute or so have someone run the starter with the spark plugs out as well when you are turning the oil pump. If it all looks and sounds good replace the distributor/plugs and start it up....Good Luck
