Seriously, people are blowing this out of proportion. The 5.8L V10 is basically a 4.6L V8 with two extra cylinders!!!! There is NO WAY a Mustang with a 430rwhp V10 will cost $50,000!!!! No, it will NOT weigh more!!!! From 5.0 Mustang and Super Fords: it weighs 90lbs less than the Cobra V8. FYI, the group that assembled this engine were on a LOW BUDGET. Also, the engine is quite reliable, as they've been driving around with it for over a year.
351CJ: The 5.8L V10 is an entirely different V10 than the 6.8L V10 from the trucks. They can't use the heads, so they basically took the Cobra R castings and glued on two more combustion chambers, valves, etc.
The sound is AWESOME. I can post the V10 file now, so you all can hear it. It sounds like nothing i've ever heard, and I can't stop playing it over and over again, just to hear it. I'll try to post the file on my site so you can hear it.