being a 84, you have a g52 trans, if you where looking for a more realistic trans swap, a w series trans would be easier, and less expensive, the w series is a stronger trans then you currently have. if your running a v8 or something with monsterous power, a r150 series would be a good choice, your current trans has a lower first gear then a r150, if you could find an r151f, that has the lowest first gear, and is a direct bolt-in( no adapters needed)