I need help in locating a 1918-1919 Cadillac engine

[1918_mike]

I'm in need of a 1918 or 1919 Cadillac engine and transmission which was originally used as a powerplant in a World War 1 Holt Artillery Tractor.  This little caterpillar is quite rare and the original engine was ruined one cold winter in North Dakota after it froze up. 
Any assistance you can provide would be GREATLY appreciated, as my 86 yr old father hasn't seen it run since he was 'single digits'.
If you have any leads on where I can find one, please contact me.

Mike

[Classic]

You might try the Yahoo Early V8 Cadillac Group:  https://beta.groups.yahoo.com/neo/groups/EarlyV8Cadillac/info
They specialize in the engine you are looking for.

[1918_mike]

Thanks!