I'll cut against the grain and say that a DOHC 6g74 swap from a Montero would actually be an awesome idea--especially when you can bolt up all the stock twin-turbo bits from a GTO. You'd probably have to use the Mitsu trans if you mounted it transverse, but an adapter might be able to make the stock trans work long-ways. Don't listen to the armchair pundits. the 6G7x is a great engine.