I have a 1987 Isuzu Trooper II, with a rebuilt 4 cylinder 2.3L engine. I'm doing research to determine what engine I can swap with my current. I would like to swap my 2.3L a bigger engine with more horsepower and more torque. But I'm not sure what engines I can swap, with few or no major modifactions needed. I know that I can use a 4 cylinder 2.6L, but I wasn't sure if that would be a worth wild swap or not. I've also looked at the 89 6 cylinder 2.8L, but was unsure if they could be switched out. Thanks.