Salvagable Block?

I have heard of mollasses before, i guess you can buy it at a feed store, and soak the block in it, dont know how much 40 gallons would cost but the barrel idea is great for sone long term storage. I heard potatoes act on rust too. Cosmoline/vaseline..whats the difference? Both would stick and vaseline is .99 a tub at dollar tree. You just want to dispkace the moisture, and i wouldnt bother with the cylinders, yoyr going to have them bored anyway unless you got sone active rust down there. Lifetr bores should clean right up.