I know randy woods dynod 390 at the wheels but that was with headers. Has he owned it since new? Could the previous owner done head and or/plenum work? I finally got mine to 410 rwhp but that took plenum and injector porting and headers with a custom chassis dyno tune. Corey Henderson said that my hp numbers were the highest he has ever got from a car that had these mods. what type of dyno? could he post the dyno sheet. there is a way by cking the sheet to see if the operator has messed with the settings to inflate the numbers. I amnot saying bs but that is 40 hp higher than any other car tested with the same set up. has he ever run @ a drag strip and coulde he post times and mph . maybe we should start a thread to see what others with the same mods have gotten. if true he has one rare freek that people would pay well for just to tear down to see how it was achieved.
