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A 4bt is a big heavy engine. I beleive you have a small lightweight truck. There are companies out there I beleive JDM is one of them that import Diesel drivetrains from Japan. These are drivertrains that were made to go in your vehicle (the overseas model). The 4cyl japanese diesels tend to be 2.4-3.4 L turbodiesels and will come with all wiring, tranny, and transfer case for 2-3K. This is a good value for a small vehicle. A 4Bt will be about 1K cheaper, but after the mods to fit it into a small truck and dealing with the vibes, noise, and weight, the small Japanese diesel looks better. If you have a full size truck or off road machine the 4bt is probably a better choice.