Maybe not solenoid but it's the thing on the far left of the manifold and it bolts down with a little deal that goes into the manifold. The other thing is just a little resistor deal. I can take some pics or post the part numbers, if you buy an engine from a yard or something it will come with these parts most likely.

The throttle bodies are not compatible at all, at least on my '04 engine. had to swap.

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped