as long as you stay under $3500, otherwise you could have went to a 4M40 engine which wipes it's ass with the 6G74 DOHC or otherwise.
Now that i'm not getting the Sport officially, I had thought about going 4M40 in the '99 but it could never be made legal unless i had a way to register it in a non emissions county. But in a '95 or older it could be done.

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped