The 3.9 would be interesting, although its size and weight might be too much for a small truck like the Trooper/Rodeo. You would also have to find a way to connect a transmission, as I believe it has some sort of weird SAE bellhousing.

Maybe these guys can help?


1988 Isuzu Trooper LS
2.8l Isuzu 4JB1-TC intercooled turbo diesel
www.dieseltrooper.blogspot.com