I have a Depotronics point to point with 2 stops that I use on my O gauge layout. Most likely same as Dallee.
These will not work on original trolleys as the reverse units a manual. The MTH trolleys work differently than PS 2 or 3. They are made to do exactly what you are proposing. You could weather a new trolley or put in a electronic reverse unit in an original. With the latter you would have to buy a track reversing board.