You all might find this interesting. A civilian GMC vehicle with a GMC 361 ci straight six and five speed overdrive tranny. A 1947 which is states as the last of the line.
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oldjalopy.com]
Here are some other GMC ARFs:
1944
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www.uship.com]
1945 - 308 six cyl engine
[
www.autogallery.org.ru]
1939 (note: lettered Denver, CO)
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3.bp.blogspot.com]
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rides.webshots.com]
As the 1947 model is noted as "the last of the series" and had a 361 with five speed overdrive, perhaps the goose engines/trannys were built for this truck line and were surplussed when the line was discontinued. It could account for them being brand new when delivered to the RGS.
Christopher D. Coleman
[
www.febt.org] Friends of the East Broad Top
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www.eastbroadtop.com] East Broad Top Railroad