Getting back to the subject at hand, it looks like the GP20 ECO has a lower profile than the GP22 ECO to meet the requirements of CP. My Guess is that the GP7’s/GP9’s as built are lower than the later GP 40’s. and they may be taking advantage of the shorter 8 cylinder engine to make the whole thing shorter as well.
The NS GP22ECO’s were built from GP38AC cores and retained the same basic dimensions. The 710-8 ECO is no taller/shorter than any other turbocharged 645 or 710.
I will do some looking to see, but somewhere I read that these units will be based out of Minneapolis…Don’t if this is true or false or something has changed…