When I had 3.23 gears in.my duster with a 360 LA I has both od and lu at 50 and it worked nice. Big thing is dont make the RPM go too high before OD engagement.
Your build looks similar to mine and you have done this as well. I have 3.55 gears. I was surprised I found only 1 kit with a couple options for engagement points. Guess I can't be too choosie. Thanks for your input.
Cley