The current Pilot T/S in Winnemucca, NV is where there used to be a 76. It was abandoned for many years. A number of movies were made at that location. Also, ran across this. 20 Pics Of Abandoned Truck Stops From Days Long Past (hotcars.com) And found this later on. whats your favorite truckstop (aths.org) Not specific to 76, just a bunch of bygone places that might jog a few memories.
No. 4 in the list is not identified but it is the Pedricktown Truck Stop in Pedricktown, NJ on I-295 exit 7. It still sits empty today and not for sale.
A couple more Uncle Rod and I missed: Montgomery, AL (T/A) and Branford, CT (now T/A Express). Also, there is currently a T/A in Grand Bay, Alabama just outside of Mobile that looks like it wasn't an original T/A. But it also doesn't have the second floor that most Union 76 Auto/Truck Stops had, so I'm not sure if I should include that one just in case or not.
The one in Montgomery, Al is a small pain in the ### but the Country Pride was still open. The one in Branford, Ct was a stop for me when returning from Maine but when they re-modeled it and removed the Country Pride I stopped going there too.
Someone told me there once was a 76 in Ripley, New York but I don't know if it was a full-fledged "Auto/Truck Stop" or just one of the smaller, truck-only 76's. "State Line" or something like that, I think the driver said it was called.
I think most of Branford's actual structure remains, but it's hidden under all the fancy roofwork and painting they did on it. It looks very similar to the one in Seffner outside of Tampa, which was built as a T/A in 2002 or so. And you're right; Montgomery isn't the best one around, between the bad neighborhood and messed-up parking lot.