Mustang or any eddy current dyno will give you a more "real world" number than say a dynojet or packs.... Ultimately it is a tuning tool, but if you want bragging numbers, go to your local dynojet. Trap speeds are really your only true indicator of power.

I have a buddy that has a Supra, he laid down 820whp on a Mustang dyno in TPA. He raced a guy that put down 900whp on a dynojet. Needless to say, he walked away from that guy in the race.

On a side note, I've heard rumors that S and R's dyno is reading a bit high as well. I had a good friend have his subie dyno'd there. Dyno sheet says 405/405 but traps speeds are 113-115 range. To me that's only mid 300's. His 60ft's were 1.7's all day.

On that note, Babilla, I'd like to see your car dyno'd on a Mustang dyno, or hit the local drag strip for some trap speed results.