I know many of you have seen this before but I cant seem to find it using the search tool. Why is it that you must use a 99 or newer engine? I thought I saw something before saying that the bellohousing bolt locations were different, but cant find that again. I also thought I saw someone say that any year will work with slight mods to the oil pan/bellhousing bolt holes. I just need to know exactly what the differences are. A friend of mine looked in his swap book, and it says that all 96 through 99 DOHC engines are a direct swap. Just need some info or a point in the right direction. Thanks in advance.