hello everyone my name is Rick B. I am in Dayton Ohio.

Welcome.
I love cars with interesting history and original owners and such.
That’s a real interesting car you have.
I think the Passon five speed is a great idea.
You might also consider the overdrive version of an original Mopar 4-speed, it should work good with all of the torque you have available for a 383.
Passon might have a bolt in version of that for you.
Also, we like to see pictures.