Update - This motor has found it's home. The original car and the motor are now united. This is a real success story, after 31 years this unmolested DZ engine will be placed in the car that was born with it.
It doesn't get any better than this for the owner of the car.
So, what did I get out of this? I traded this engine for an unmolested DZ engine that was assembled just 4 days before my original engine was assembled. This is about as close as I am going to get, given the number of true DZ motors left in the market.