Big difference in locations here. Merriam and 171 St is right at the Washington Bridge in Highbridge.
Marion Ave at 193d is in Fordham.
If BN 27 is the Chief it must be the latter.
Could be one of two boxes. 3334 is at 193d and Decatur. Normal response on 10-75 is
48 79 88 75 56 37 38 FAST BN 27
Also could be 3378, Marion at 194th. Historically, the same response, but then E75 moved several blocks further away and they (and L33) picked up the box, so it would be
48 79 75 88 56 37 33FAST
Makes no sense, but there it is.
My aunt Alice, God rest her soul, lived on the NE corner of 193d and Marion when I was a kid. 88/38 either box. Not now.
Anybody got the actual rundown?