I had mine on the dyno back in Nov 2008. It was an unusually warm day, something like 80 degrees that day. I did two dyno pulls 1st was 363.25HP/356.88TQ 2nd pull was 364.17HP/354.20TQ. 60 HP is more of a HP/TQ loss than I expected, but it's a bone stock engine with automatic trans.
I can't seem to get the dyno pic loaded. It's on my car domain page though. I will try to re-size the dyno pic so I can load it here.

 

A fair OEM drive line will rob about 15% from the crank HP/TQ. I've seen some that go as high as 20%. 400HP minus 15% is 60HP. Sometimes. if you're lucky, manual shift trannies are a bit more efficient. Anyone dyno'd a 6 speed, yet?

 

I will dyno mine after break in, but that will not likely be until June or July. Ohio...sheesh![:@]