Just wanted to bring this thread back up and include some of my own pictures. While I had the window out I installed the same basic eBay kit. I originally tried to use the outer most bolt from the door latch mechanism to mount the top part of the bracket, but it turns out the door latch mechanism would hit the nut that I had added and wouldn't close completely.
So I ended up having to drive two screws. No big deal. The actuator sits a crooked as a result, but there is more then enough play in all the parts that it shouldn't be a problem. On the other side I'll mount it more vertical.
Anyway for 20 bucks plus the cost of a cheap alarm or keyless entry system it seems like a good mod. Thanks ShelbyDogg for originally posting this!!!
Travis
72 Cuda