hmm.. there comes the topic of stock blocks again.
You can't really say one thing about them as some people are running perfectly with no problems with a turbo for around 40k miles.Also, people turbo lots of other motors which were designed for N/A application with no problems (such as ka motor in the 240sx). I am going to see how much my motor will last with the stock block consider that I have turboed the car at 45k and I am putting on miles quickly (about 60 fun miles a day ). I will get it tuned with utec and go with a return fuel system pretty soon though.