I guess these are critical if you are packing 8 or 9 cars in a trailer that uses the automatic lifts. It would be more expensive if one had to let a space open because of a "high top" car.
I can give you measurements off my 1930 614 including with or without the bumpers, and with or without air in the tires (makes it shorter). However, I think the measurements are also in some of the Durant literature including the weights. Let me know if you want me to go to the garage with a yard stick.
Where Are You From? Auburn and Ellensburg, WA
Do You own a car built by Durant? Yes 1930 Durant 407 & 614