"As Delivered" is a good thing. Based on Rapido's artwork, the only units with the "bookend" fuel/water tank were the New Haven, the demonstrator, and the ex-New Haven PC units which, once again, essentially make the New Haven units unique.
I shot the new RS-11s westbound 62 years ago canting to the curve at Boston Switch -- even the engineer looks spic and span. This was a time of surprises -- new power, new paint schemes -- and there was no web to provide information. Fuel tanks; I doubt I knew where the fuel tank was at the time.