I have a 4.3 v6 that's ca legal this is what you need to know 1 the donor motor has to be the same year or newer 2 youll need all the smog equipment off the donor motor 3 the easiest is find out who your local referee is and tell that person what you want to swap in and he or she will give you all the info for what they are going to look for 4 once you know that whatever shop you decide on hand them that info 5 have fun
