The torque converters wont swap because of the E4OD has the lockup mode. Any IDI auto trans flexplate design will fit any diesel C6 or diesel E4OD trans. The only flexplates that wont fit from the E4OD is the powerstrokes. They have 6 bolts that hold the converter to the plate and 10 bolts hold that to the crank. Be careful because some flexplates are the 3 piece hevay cast iron types and the others are the lite stamped plates with the ring gear welded on... Those require a special spacer to take the place of the missing cast iron wheel...