5-speed swap

well, i dont have one, but my buddy does. he has a dakota 5 speed in his 69 satellite. the only problem is, he had his flywheel/clutch zero balanced and now he finds out he'll have to get his motor internally balanced for it to work.
but i think he has said f'ck it and is going with a 383 4 speed when he finishes putting his 76 d100 back together.