Niki Lauda Brabham BT 48, 1979, US East at Watkins Glen (again). The other guy is Hector Rebaque in the eponymous Rebaque HR 100. thx for putting him in, only ran in three races, that nicely solved the track (I hope)
my source says they only fielded the car in three events: Glen, Montreal and Monza. Cannot quite believe it is one of the others: Montreal is on an island and Monza is in a park, doesn't look like it ...
My source says that he ran all season but only the last three under the Rebaque banner. Didn't look that closely before (sorry, my mistake) but it is not one of those tracks. The tracks screams F1 though, hope it helps a bit