Blown head gasket?

[thstone]

The last long block that I bought had 90K miles and dyno'd at 190rwhp. It cost $1800.

I can find them consistently for $2,500. These engines are throw-away consumables. There is no reason to over pay. Don't buy into the hype that these are hard to find or special in any way. There were over 220,000 Boxster's sold so there are more than enough used engines and many of them sell for very good prices.