the box is almost same, i think the later EB had the world class T5 with better bearings
My brother ran one in his EB for years. if it's in good nick it will be fine if not thrashed , might need to do something with the gearbox mount, not 100% sure if they are a direct fit, but should be simple to fix as My brother isnt the best engineer
as Chestnut said, the bell housings are rare, always were, same for the cross member.