OK, that's what I thought it should bolt right up. Yes an OD transmission is a good choice with the torque available. My engine guy says the torque of the 6 will be close to 500 ft lbs with the boost and injection system, to take advantage of that the OD will give me a good top end, while taking advantage of a tire burning rear end ratio. I could do up an 700R4 that will handle the torque the 6 will deliver, but there is no cost difference between that and a 4L80E with the same power and torque handling capability. The 4L80E will give me full manual control that the R4 won't.(something I want). The R4 is somewhat smaller and lighter, that I will give you. I will make the decision in a bit, I have a while before I need to make that choice.