It won't be that easy. The AOD has the bellhousing directly attached to the motor, and the 5.0 bell won't fit the 2.3 block. Your best hope of doing something like that is buying an addapter plate, which is at least 400 bucks.
i as well have a 4-banger and doing anything is pretty costly and limited without changing more then you expect. Look into it all carefully, the guys here are always helpful. Personally, im waiting it out and building a 5.0 for a complete re-do.
