Trying hard to recall what Ford race cars had a strap to raise & lower the door window glass?....... Not sure where the lift mechanism and window tracks stop/start on Mustang but there's some weight in metal there..

This is my first post here. I'm assembling a 390 for my brother-in-law. Anyway... I have done upholstery work for a living. Several years back I worked on a Olds where I remove the window regulators, notched and rolled a slot in the interior trim, and used seat belts to fasten the windows in the up position. I think we took about 30lbs off the car. I saw this done on super stock cars back in the 70's.