Electric Life power windows don't fit

I have a set for my 70 Dart and they only have one arm. Maybe you can check out electric Life's web page and make some sense of it.
Their website doesn't have a picture, but every company that sells them online shows the same one that I have. I need to find someone that has put them in a Duster to see what their lift mechanism looks like. I can cut mine up and weld it back together to match the original, but I want to find out if there is one that they manufacture that will fit. You Tube has in install on an E body, but no A body installs.