Short Shaft Slip Yoke 727's in Old Airport Tugs?

Our Ferry Corp bought about a dozen "retired" ones to move baggage carts back and forth from the ferry to the terminal.
I don't think any 2 were the same, "like a box of chocolates", everytime you lifted the hood, you never knew what power/trans/diff.
They were geared to "tug", - top speed, high gear maybe 10 mph, no suspension !