This is several years old, but is still cool: ford 300 dyno test - Bing video

 

That's a pretty good dyno run, considering it's an EFI head (seen at 0:30)

I wonder if it would have made more with a carbed head.

 

sounds very nice,

 

It sounds great! I would love to drop it in mine.

 

That may be the whole reason it didn't make all that much power, in my opinion.

I have dynoed my truck now on two different dynos, and have put down 220hp max and 318tq max at the wheels, and average right at 200whp/300wtq and that's through an oilbath air cleaner. If you figure the average 15% drive train loss, I'm making almost as much hp and just as much tq. My losses could also be more, as it's an old F250 truck, two piece driveshaft, Dana 60, etc. I also have a big heavy alternator and A/C compressor hooked up, EFI exhaust manifolds, not headers, and full length single exhaust.

I don't know, just looking at the differences, I'm either not too impressed with what they make, or more impressed by mine.