How to identify a flathead motor

str8axle63

Member
I have a 42 ford marmon-herrington are there numbers or other ways to find out the year horse power etc.. Of the flathead, its a v8
Thx
 
You can narrow them down to within a few years if you know the characteristics of the early Ford V8. This is a good link. https://www.fordbarn.com/forum/showthread.php?t=25301&showall=1

In the 1942 time frame there were still 221 CID 85 HP engines and the larger 239CID 95 HP engines. The larger ones were sometimes used in trucks but many were relieved between the edge of the cylinder and the valve pockets. Cylinder heads can also be identified by casting marks but they may not accurately ID the engine since there is a lot of interchangeability with the flathead V8.
 
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