Safe to assume the red is an aftermarket fuel tank?
Wonder what happened to original.
Or is this the original fuel tank which sometimes was in cab and has been moved outside?
And note the extended coupler and knuckle pin lifter
(which probably has a proper technical name but I can’t recall it right now)
http://www.northeast.railfan.net/images/mvcx0.jpg
From today’s regular Friday update at the website.