I am looking at taking a huge leap and swaping my 4cylinder engine for a 4BT Cummings. I am needing to get just a little bit more info other than what I've been able to find on the net. For starters this is my daily driver and I need to know if this is going to make me unstreet legal or is there any thing additional needed to make this happen? Secondly I've read that I will be able to keep my original transmission and transfer case and I've also heard otherwise can anyone clear this up for me. Same goes for the axel. If anyone out there has done this swap or knows someone who has could you please get me some straight answers.