I agree, your timing belt should be done every 100,000k/s at a minimum. Timing chains in the KA24E seems to get a bit dicey around the 200,000 mark.
Mine was done at 97,000 again at 160,000 and again at 203,000 when I got the water pump replaced.
When I bought my car it had high'ish kilometres but almost all of them done on the highway out around Colac, travelling at a low rpm with alot of air being pushed through the radiator. I think if the car has been correctly looked after all its life, you'll be fine.