T/A racing was never mopars forte. The chally's and cuda's were just too fat compared to the competition..why they didnt go racing in the lighter A is beyond me...
At first, the Trans-Am vehicles were primarily modified versions of the road-going car. The competition was divided into two classes- an "Under 2 Liter" class (predominantly small European sedans) and the "Over 2 Liters" class (displacement limited to 5.0 liters, or 302 cu. in. ).
The first race was in 1966 at Sebring International Raceway. The overall win went to Jochen Rindt driving an Alfa Romeo GTA (an Under 2 Liter entry), with Bob Tullius (driving a Dodge Dart) taking second overall, but first in the Over 2 Liter class.