Hi, LIRR Steamer.
As always, thanks for the enlightening information.
The R-17 was one of my favorite car types. During the 80s, I spent a lot of time photographing the IRT West Side Line which, at that time, was dominated by the R-21 and 22 classes; however, as the new R-62 cars were placed in service on the Jerome Avenue and Pelham Lines, R-17s displaced from those services began showing up on the 1 Train much to my delight.
Here's the 6560 which I shot at the 238th Street Station with Manhattan College in the background in 1985:
Returning to the South Brooklyn Railway for a moment, I found this early 20s image of Gravesend Avenue looking south from Ditmas Avenue. Of course, the tracks were a very prominent feature of the street:
I'm sorry I never got to see an SBK train run down Gravesend/McDonald Avenue in person.
Bob