Will a truck 727 work for my Dart

I put a 727 under our first 67 notch that came from a Tradesman 200 van. I know I had to change something but my memory fails me. Maybe I turned the center piece of the cross member around to get the mount lined up. Anyway... It was a mistake.
The 904 has a lower gear ratio and put the ponies to the ground a heck of a lot better.
My second mistake was throwing that 727 away. I couldn't give it away then. I could sell it today.