The E4OD is alot bigger than a C6 but you could probably make it fit. The only problem is that it is electronic. You would need the transmission harness and controller from a diesel (since the diesel is the only E4OD vehicle to have a stand alone controller)and you would have a tps sensor. Jet electronics has packages for a conversion. You might be better off going with a build AOD, you can now build an almost bullet proof AOD. Places like ART CARR sell the AOD's that can handle quite abit of horsepower and torque. You can also find the parts to build a strong one yourself. Just some thoughts.