What I would do I download the DANA/WeatherHead Catalog with all their fitting listings in it. If you look under "Special Adapters" you can find a few fittings that say transmission coolant adapters, they may or may not work for you, but they have pics and thread descriptions of every fitting. In the catalog that I have "Special adapters" starts around page 125.

Conrad

Oh, and you can get/order the WeatherHead parts at your local NAPA.