Hello all
Many Hudson's were used in outside 3rd rail layout ... both the 700 and 763's ...here is a link to see a 763 running with outside 3rd rail sweeps modified by Robert Foster in the late 1930's ..pulling a string of Walthers cars also from the late 30's.
https://www.youtube.com/watch?v=XBB7c1tqYVs
Cheers Carey