1951 Willys Pick Up

[TJones]

Does it even turn over?
It could be several things but if it didn't even turn over a little bit it sounds like a timing problem.
You would have to check with one of the Elders here to find out TDC, the firing order and where the timing marks are, typically its on the cam and the crank. Like I said I'm not to familiar with the 4 cylinders but one of the Elders will know.