I pulled the trigger today and went with a recommendation to CCI Driveline in Detroit for the Aluminum drive shaft and a Sonnax Billet slip yoke.
They were very informative about there services, and very inquisitive as to my intentions with the car, weight and all.

Family run business and simple to work with.
I'll let you guys know how it turns out. I'm optimistic.

Dynotech just never called, not even to say that they are too busy. Oh well, money has legs.