A Cumbres locomotive on the Loop?!! Oh yeah, now I remember.... I think that this is a case of the Colorado HISTORICAL Society not entirely understanding what they were asking! The K-36s are WAY to large to fit through those cuts and Antonito would NEVER give up the K-27 (although I think it is probably too large for the cuts as well.) 2-8-0's are about as large as the GTL can handle. Add to the fact that the D&RGW never ran on the GTL and there goes the "Historical" part in that CHS scheme.
I'm sure this request for information was just one of the CHS's first attempts to find ANY steam for the GTL! I'm sure that these reasons not to pursue C&T locomotives are now very clear to the CHS as nothing more has been said about it.