I ran across a similar case a couple of years ago with a buddy of mine for a truck he was considering buying.... although I believe we stopped short of dragging down the road as that was not an option given there were no wheels on the vehicle. What was the result of your dragging it? was everything locked. What did it do? What is the general completeness situation of the engine; Are we talking a rusted hunk of junk, or a fairly well and complete unit that retained it's hood? it goes without saying you will want to pull the plugs and disconnect any accessories such as generator, water pump, fan, etc. HOpe others can help you..
