I know the QuickTime G3 bellhousing moves the starter to the left side, same as the QT bellhousing for the LA small block. As far as the TR6060, the Tremec T56 based transmissions have some differences in the input shaft based on the model, ie, Viper vs Ford vs Chevy vs T56 magnum vs TR6060. I don’t see any reason why the TR6060 has to be a right side starter, but, I’m not versed enough in the TR6060 to know if the G3 QT bellhousing is compatible without changes to the front plate or input shaft.