I didn't make any provisions when I rebuilt my window motor, I just took it out thru the speaker hole with the window up.
And we talked about this in another thread, but the only part of the window that needs lubed is to spray silicone in the rubber vertical "slot" that you can see from outside the car. Put the window down, spray silicone in there, and wind the window up and down several times. It will also work it's way all down in there where it needs to.
This was recommended by RobertP, who has worked on more T-Birds than anyone. He mentioned that Honda brand silicone was best.
And also mentioned in another thread, just rebuild the motors with new plastic pins. The total cost is under $10, versus $150 for some inferior parts. Will take an extra hour.
97 T-Bird LX 4.6 - 68k miles
94 Supra TT Auto - street/strip car
04 Crown Vic Police Interceptor - Brenda's car
95 T-Bird LX 4.6 - fully optioned, owned 15 years
96 Cougar XR-7 4.6- Brenda's car, owned 11 years
88 T-Bird 3.8 - first T-Bird, owned 5 years