I might be alone here, but I have noticed before (even on cars with low mileage) on ebay, for instance, how many cars on there talk of their engine being "newly rebuilt". Now, I am not saying it has not been rebuilt, but I would only want a car with a factory sealed shortblock. That is, of course unless it has been rebuilt by a guy known for rebuilding our engines correctly.
How many horror stories do we read here, and see in with GN's that we know. I just had my engine rebuilt, and now I have no oil pressure, what do I do? Sometimes I wonder how many engine builders actually know the tricks involved in building the 3.8 to last. If you treat it correctly, a stock 3.8 will run forever, very few rebuilt ones seem to, maybe it is just me.