I have replaced glass on the yellow SV with door skin in place. Remove inner panel and make sure window is all the way down. if they used the thunderbird tracks and fiero motor, you should be able to remove window from bottom track and unbolt the thunderbird track inside the door. Pull glass out and then install glass in reverse order. Normally bond glass to bottom track with silicone sealant.
Thank You Dale..... I will give it a try.