Replacement coil for american craftsman window

I am very sorry for the long wait; we appreciate your patience during an incredibly busy season.

Your shoe looks like a match for the 15-087. The 8-pound S180-08 spring is sold separately. Review the specifications and see what you think.

We don't have a video or instructions for these parts, but see the diagram below. If there are no cutouts in the window track to remove the hardware, you will have to make your own. 

Detail of 15-087

Series 180 coil balance diagram