Neil,
I can't say one way or another how they came, but look at
the attached photo of the 1957 Dodge order form. The dealer
would have to have some inside knowledge to know what checking
box 385 was going to give him.
I also have a Dodge Options ands Accessories price
bulletin dated October 30,1956. It lists the 4 window power
lift ( All except 2-Door Suburban ) and the tailgate window
lift ( Two Seat Wagons only ) as being available. No 2 window
power lift is offered in it.
Kevin