Sounds like it might be best to find a complete '99 5-speed Trooper. You could just swap the motor, trans, computer, and t-case out of the Trooper at your own pace. Only the finishing touches would require finding a Rodeo, it sounds like, so that would be the only junk yard scrounging you would have to do. Selling the left over parts from both rigs might offset the price of buying a complete Trooper. Does computer swapping in a late model Isuzu create problems with emissions though? I know some vehicles won't pass emissions inspection after a computer swap because the VIN's don't match and it throws a code...