Hello Patrick (Railride)
Yes, I also know that area you worked in very well. I had an Aunt I and my family visited a lot in the 1950's who lived a few blocks down (east along) Westchester Avenue from that Southern Blvd. intersection - along ANOTHER IRT EL that entered and curved upon and over that same Westchester Avenue - The IRT Pelham EL coming up to it from Whitlock Avenue. She lived along that EL 2 blocks east of, past, the Bronx River drawbridge on the Avenue.
Here are a few photos from my collection for you to enjoy - YOU know the locations I am sure - some are more recent and some from 50 or more years ago -- the way I remember that entire area back in the 1950's - 1960's period.
NOTE: The TWO photos just above the LAST TWO photos - are taken under my O-Scale EL System !
Place your cursor over each photo to get a location caption popup.
regards - Joe F