Unfortunately they have integral bellhousings and the converters are different for I6, Turbo, 3V and 4V. They must use the specific torque converter and cannot be interchanged and of course they are matched to the valve body. They have lock-up on all gears not just 3rd and 4th like the BTR.
BTW the 3V has the highest torque rated converter of 414nm @ 2000rpm. Turbo and 4V are rated at 297nm and std I6 is 278nm all at the same 2000rpm.

ok ...better switch to plan b ....thanks for the info