Its an interesting piece.

“For sale is a pull behind Willys Power Unit. It had a fire pump on the back which has been removed and sold. You can buy it and put another pump on the back, or a generator or an air compressor or???  The engine itself is a 4 cylinder Willys. It’s hasn’t ran in years but it DOES turn over. Since the pump has been sold ahead of it, I AM willing to sell just the engine if you’re not interested in the whole thing. $2500 for the whole thing or $2300 for just the engine. You remove AND haul. ”

http://moseslake.craigslist.org/grd/5311924357.html