Not everybody had access to Conduit Highway. And you well know, the Performance Shops that had Dyno's were 5-times busier than the ones that didn't have them.
That would be tuned by "Charlie Dodge", my in law.
God rest his soul.
The "Conduit" was a happening spot but a poor place to tune the car via trial and error. (Why you mention that is beyond me because it was a place to run not experiment with the car.) If you were serious about tuning the car in a DIY manor, E-Town or Island is still available. The East Hampton track is gone.
(How long have you been out of state?)