While you are letting the oil soak inside the cylinders, pull the carb and clean and rebuild it. I would ignore the gas tank and get it running off a small gas can first. No telling what kind of shape your fuel lines are in. Better to deal with one thing at a time. Pull the dist, taking note of the rotor and vac advance location. Buy or fab a oil pump drive shaft that chucks up in a drill, replace the oil, and spin the oil pump till you get oil outta the rockers. Now you should have oil everywhere inside the engine. Install the rebuilt carb, plumb the fuel pump to a gas can. Assuming you have been able to turn the motor over by hand, you can now put a battery in er and fire away.