Carob

Thanks, I'll look into adding an intercooler.

Much appreciate your advice.

Thanks Manxman

No I don't have a boost compensator. 

I'm not worried about getting extra power because it now has plenty especially since changing the diff it has a good cruising speed with acceleration when needed and doesn't rev it's guts out now on the open road.

 The main concern is it lasts a long time and taken good care of is the idea of the intercooler.

Or would I be better to up size the radiator?

I have a 2wd LN147R 5LE Hilux.
 Have added a Turbo, Chip, Exhaust and wondered if adding an Intercooler will help to keep temperatures down and be better for the motor?

I've replaced the 4.1 diff with a 3.7LSD so it doesn't rev so high at higher speeds and that has made a huge difference to the driving of the ute.