Hi Stockappy,
Well the gearbox is a bitsa, td42 bell housing, torque converted and input shaft. But the rest of box is 3L. (automatic)
I purchased a donar car to do the conversion and the car alone set me back $4500. Being an import swb it was 24 volts so had to convert it to 12 which isnt hard.
All up in parts alone cost me around $10K but well worth it.