Drawings for Army Diesels on the D&RGW Narrow Gauge??

Are there any drawings available/published for the US Army Diesels that were used on the D&RGW narrow gauge? Do these locos still exist somewhere? If not, are there similar surviving examples? IIRC they were adjustable to accommodate a number of different track gauges. A true 1:1 rubber gauge loco! I do recall seeing a locomotive that may have been similar to these that was at the Jamestown Sierra Railroad roundhouse complex. It just may have been a diesel locomotive with adjustable wheels, but in no way resembled any of the Army diesels that were tested the D&RGW.

Thanks in advance for any info you may have.

Jake Johnson