No takers on this yeat, so thought I would go out and do some research today at the local inspection station. Was told that as long as you had catalytic converters on, and it didn't pull any codes, it would pass in Marietta Ga. The guy stated that they enter your vin # and then size and type of engine. Even if the engine did not originally come in the vehicle, it would check to ensure the engine was complient. Got this info after asking a lot of questions. I think I will go to a different one tomorrow and get a second opinion, and probably a third while I am at it. The guy asked, why would you want to put a 5.0 in your Ranger..... My answer, "Cause I can!"