I am not a tuning anything. I am pretty much clueless on tuning with HP tuners. I've had it for years just to do my little dumb stuff with it.
But looking at a friends GTO file and where do I go to see which system it tuned for in the ECM? It's an E40 and we don't know if it's 24x or 58x in the tune. His new engine is 24x

 

if it's still the same ecm that came in the car...it's a 24x. All the 2004-2006 gto's where 24x

 

It's not the original engine. It had another engine in it and my friend thinks it was a 58x. Right now he is getting no spark. But I'm not there to diagnose the wiring right now. Just going off what he's telling me. I have his tune file but don't know where to look. Also I don't have Pro version, just Suite. I wonder if that's why I can't see the entire OS. I'm just guessing here.

 

As far as I'm aware, there is no switch in the tune for the reluctor wheel type. Tell your friend to take a look in the crank position sensor hole and see what wheel he has. If it is a 58x, he has basically two choices, remove the engine, remove the crank and find a shop to replace the wheel, or install a Lingenfelter 58x to 24x conversion box.