I have JetCoated TriY headers on the car now, no way they would fit with the AOD. So, once I added up the cost of new JetCoated headers, an AOD that would take the 430# torque, and then the rest of the parts required for the AOD, the GV was almost the same cost, if not less. Besides if I play with the controls for the GV, I can have a 6 speed trans not just an overdrive. It can split each great not just the top gear.
That is exactly where I located it in my car. To make assembly easier, I used clip nuts of the firewall side flange, and found that one of the holes already in the firewall that help a wire loom clip in place could be used as a mounting screw hole. This made it very easy to mount correctly. You could do the same thing on the left side, where your punch is holding it in place. Just make your bracket a little lower on that side. By the way, I do not have a sheet metal brake, so I took my bracket once it was cut to size to a body shop. The guy there was more than happy to use their brake to bend the bracket for me. It sure made the bends nice and neat.