Has an f-head.

“1942 Willys Ford Script GPW (General Purpose Willys) If you know Willys you know this one is rare and hard to come by! It was only made the first few months of 1942. I’m not an expert but it does have the Willy’s Grill and possibly a Ford stamped Willys frame. The engine is not original but starts and runs perfect. I think it is an early fifties F-head. Starts runs and drives great, 4×4 works and the tires are in Nice condition. Like most Willys 70 plus years old it has had modifications including a fuel cell and selecto hubs. The Body and Frame seem to be original and mostly unmolested. It has a few minor oil leaks but you can drive it down the road today! Clear Montana title in hand. If it were original it would be a $40,000 rig unfortunately those are very hard to come by! I believe the price is fair at $6,800 but will consider serious offers”

http://spokane.craigslist.org/cto/5639516315.html