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I did a V6 to I6 swap on my 86 jeep Comanche a few years ago. I pulled all the needed parts from a local salvage yard to include wiring harnesses and hte like. This was a Big job! as the Radiator supports needed changed, the motor mounts, and all the wiring under the hood. I decided to go with the AW4 4 speed automatic transmission which required the transmission control box which is installed under the glove box. When I was installing in the engine I learned that the firewall needed pushed back about an inch. Nothing a sledge hammer could not accomplish. The strangest thing I learned was the need to wire the torque converter disconnection circuit which operated off a separate vacuum switch associated with the cruise control. It was not hard to fix, I just wish I would have done this 30,000 miles ago. I also added the comfort power switch in the dash that required some minor wiring and the addition of a new fuse in the fuse box that provides power when the key is on. This switch adjusts the shift points of the transmission. The truck drives like a different vehicle with the disengagement of the locked torque converter when I step on the brake pedal. Additionally it shifts through the lower gears more smoothly when the converter is not already locked up. I think it locks up now about 35 to 40 mph. I hope these comments will help you not repeat my failure to completed the AW4 torque converter disconnect wiring correctly. Happy Trails