Would a trip to the dyno be worth it?

I have an 02 6NZ that was a factory 435 HP engine. Supposed to have had an inframe and be a 550. No paperwork and Cat doesn't have any info. I've been thinking of going somewhere to have the ECU scanned and see where it's set. Thought about putting it on a dyno just to see what I have. Would I get anything out of it? What would be a ballpark cost? Truck runs good, no major problems. Just checking what my options on some upgrades would be. If it's at 550 that'd be fine by me. If not, would like to put it there. I'm about 30 miles south of Youngstown, OH, if anyone has suggestions.

 

I appreciate all of the suggestions. I was wondering about the dyno just to see what I had. I had heard that it may be able to predict some looming problems. It's not a must have. We do good maintenance, so I'm not too worried about it.

This is the data I have from Cat on this motor:
C-15 TRUCK ENGINE
Engine Serial Number - 6NZ82245 (Build Date - 09/08/2002, Test Date - 09/08/2002, Ship Date - 15/08/2002)
324/373 BRAKE KW (435/500 BHP) AT 2100 RPM. FREIGHTLINER, JAKE BRAKE

It's on my list to have the ECU checked and see where we are. Need to check around for some prices, and see who I can get to do it.

 

Thanks for the info. So, if I were to do an inframe on this engine, what would be the way to go for parts to handle 550-600 hp? I see there are numerous kits available from many different sellers. This will hopefully be a ways down the road, but it is always nice to have the info in my notes.