Early GMD 16-567D engines

[SSW9389]

If you want a new idea, read an old book. The GP9 Tally in the January-February 1972 issue of Extra 2200 South has two interesting entries. CN GP9 #4346 was delivered with a 16-567CD engine rated at 1800 horsepower. This would be GMD serial A-1781 on order C-263 shipped October 9, 1959. And Canadian Pacific GP9 #8839 was built with a 16-567D engine rated at 1800 horsepower. This would be GMD serial A-1730 on order C-260 shipped August 31, 1959. These two Geeps appear to be GMD engine demonstrators. Does anyone have anything else on this? 

I've never seen the term 567CD before or since.

Ed in Kentucky

[Overmod]

SSW9389

I've never seen the term 567CD before or since.

See if it means the heavier D block with C-engine parts and procedures commonality with the rest of the Geeps.

[SSW9389]

My swag on 567CD is that it is a 567C with upgraded bearing surfaces.