IF the transom is good I think you would be ahead of the game to just replace the I/O. If the I/O package is origianal to the boat I would replace the whole thing intermediate, outdrive, and engine. The complete package. If the boat has been repowered recently you might get away with just the engine. The V-6 packages are reasonable and should go right in. If you opt for the bracket and outboard you will be rebuilding the transom anyway. Personally if you find the boat sound and purchase it I would just put the I/O back in either way. Check the boat out well.