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I own the same engine combo in my ute. I used a turbosmart boost controller they are about $100 and are easy to use and fit.
With the 3" exhaust make sure it also has a larger dump pipe to suit the 3" exhaust. AN intercooler upgrade is a good idea if you are towing a lot as the factory one doesn't work very well when boosting the old girl up. The cross country items are a good unit and are a bolt on item, apart from the scoop.
Also if funds permit a turbo upgrade could help and a Garrett GTX2863 would work quite well with the injector pump that are fitted to these engines.
There are plenty of threads in the members rides and also a 200kw thread on here you could look at for ideas.