* The most common engine was likely the Pontiac 400 cubic inch (6.6L) V8. Torque varied slightly depending on the specific carburetor and other factors, but it generally produced in the range of 215-230 lb-ft.
* Other engines were available, offering different torque outputs. These would include smaller displacement V8s and possibly a six-cylinder option. These would have significantly lower torque figures.
To find the exact torque figure, you need to know the engine code or displacement (e.g., 400, 301, etc.) of the specific 1979 Trans Am you're interested in.