My experience...A good break in oil with a half can of EOS in the oil, I have one of these 12 volt oil change / drain set-ups that you can change your oil by inserting a tube down the dip stick tube, except I directed the flow into the camshaft area after removing a valve cover. TOOK MY TIME and directed crankcase oil all along the cam/lifters, oil runs back into pan and gets pumped into the cam valley. Give the pump and battery a rest every few minutes, meanwhile SLOWLY turning the motor by hand..breaker bar on the crank. Repeated this SEVERAL times before I stuck a modified distributor into the motor with a Milwaukee slowly turning the dist. and a friend on the breaker bar turning the motor slowly. Repeated this several times over a couple of days, had a BBC valve cover with a cut open top to watch the rockers oil and keep it off the floor. I did not hurry the process, lit the motor up, kept it 22-2400 RPM with a little cycling, water hose on the radiator, ran about 4-5 min., shut it off, let it cool and repeated it one more time, checked for leaks , timing, carb settings, etc. and drove it away with no issues. I'm a patient person, if you're in a rush, step back. This was for a motor that had sat a while after being built and dyno'd. Others may have a different approach or method.