Is that the jeep with the 4cyl. flathead made by Ford? If so I've built a few of them. Every piece on that engine has the letter f on it. Also has a timing chain instead of just gears, cam turn in the other direction. I built one a few tears ago for a guy restoring, the top of each head bolt had an F on it, 9 of them the F was rusted off, the guy paid 90 buck for 9 new bolts. Walt