They're not the same. The GT500 bolt pattern is a little wider. The "CJ65" is for the GT500. To make this work on a GT, you'll have to either run an adaptor, or hog out the holes. Even then, certain GT intakes (like the FRPP 3V intake) still won't fit the GT500 throttle body without an adaptor, as the gasket doesn't line up without it.