jeep grand cherokee 5.2 as donator for my dart gt -65, what gearbox should i use?

Another slight "wrench in the works." What year is the Jeep, IE is it throttle body EFI or multiport EFI, or are you going back to carb or "something else?"

Reason: Later multiport EFI will require use of original converter flex plate which has the crank trigger stuff. You'll have to mod the bellhousing of an older trans to accomodate the pickup coil.

Earlier TBI does not use this.

Also, if you use the Mag flex plate, the converter bolt pattern is "off" at one bolt. Usual fix is to die grind etc the hole to fit.