the rocker arms that has the shaft dont shot oil all over the place like the open push rods do, it sounds like the lifters are stuck up from sitting. if youve got oil at the top of the motor, that tells me the motor must not be to bad. have you changed the oil? it not a good idea to start braking all that sludge loose do its going to the pan and really stop up your oil screen. change the oil and filter and add something to help clean the lifters, let it run and give it enough time to clean the lifters. if you wonted to clean the motor, we used to (at the caddy dealership in 1960) use kerosene and add a qt. to the motor and run the motoe about 30 min. and then change the oil and filte, it will clean it like a new one.but the first thing i would do is add something to help clean the lifters, or flush the motor before i pulled the pan off. you cant clean all that junk out of the motor by hand with the motor in the car no way.