Herclues JXB engine

[Kirk-NJ]

Was the herclues JXB gas six cylinder engine used in any of the cletrac/olivers?

[John Schwiebert]

I need to look at the early model B tractors. Remember the difference between the JXC & JXD engines they used is bore size. The outside dimensions are the same and many parts interchange.

[clueless]

I don't see any JXB in  the listings in my old stuff (old parts catalogs).
The BD did use the diesel (DJXB) but the Herc gassers in my stuff are JXC and D.
However, parts catalogs are often incomplete; I don't have anything definitive re' all the engines used.