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At 330,000 km's your still ok to put turbo on. I had the same as you GQ TD42 N/A, bought a second hand turbo from a TD42T GU done only 180,000km's for a $1000 which came with the turbo, air box,...

Give the engine a health check (compression test, head crack test, rad pressure test etc) If these check out and are within spec slap a turbo on it she will handle it and will give you the best fuel...

There is a lot of information to put in here so this post/thread will keep growing over time, I'll add photos as I can.

This is by no means a complete or definitive guide, my aim is to give people...