storing a engine for the winter?

i have put my rebuilt/never ran 340 in the valaint, but iam not going to be able to finish it right now, what can i do to keep it good for the winter, the intake is blocked where the carb goes with tape and cardboard, and the sparkplug holes have paper in them...should i oil the cyl down good with oil, or put plugs back in.....it has no water, or oil in it now...the car will set outside....