$450 chinese turbo and 600 plus HP(food 4 thought)

I read an interesting article in one of my magazines were they built a 600 plus HP stock 350 with an ebay $450 chinese turbo.They got the motor from the bone yard with 160K on it. I think they were getting 5000 to 10000 miles out of the bearings.in the turbo(bearings being the weak link)
I could post the article if anybodies interested?
I wonder why they didn't upgrade the bearings? The article said other than the bearings not being the best the units were pretty substantial