I'm in the market for an extended E350 Ford van and recently became aware of a tendency 5.4 liter (V8) and 6.8 liter (V10) Triton engines have of spitting their spark plugs. I was just wondering how many of you reading this have a Triton engine in your truck, or trucks and if you've had this spark plug ejection happen to you? Apparently, there aren't enough threads in the spark plug bores in these engines' heads and that can cause the spark plugs to come shooting out of the heads when the engine is running. When this happens, the head has to be replaced, leaving you with a repair bill in the neighborhood of $3000, to $4200! I'm looking forward to any feedback I can get on this. This really has me nervous about the idea of getting a van with one of these engines now. Thanks guys.