Rob,
I received the Gen IV throttle bracket. It's a nice idea, but I was disappointed that the holes didn't line up. Hopefully this is a once only situation.
Here is my 71 throttle pedal compared to the Gen IV pedal.
You can see when the original pedal bracket is placed on top of the new one, it doesn't line up. Bottom hole in line… Top ones don't match
The holes would have to be re-drilled or re-worked some how. Top left hole in line… Others don't line up.
Top right hole in line… Others don't line up.