Is there anyway I can obtain any previous work accomplished on my 06 Super Duty?

I bought it used and I know it has been studded. Also it has a pyrometer gauge and 4 inch turbo back exhaust. I cannot tell if the EGR is deleted.

I did have issues the first two days after purchasing with the CEL coming on when I would run it hard. Ford dealer told me the truck has a dirty egr valve the first visit back which was cleaned by them. The second visit back was found to have a carbon piece stuck in the turbo. I do not believe any of this but I believe they reflashed the computer.

I'm mainly concerned about egr deleted and oil cooler replacement. I have had the FICM and STC connector replaced.

Thanks for any input.

 

If you're getting a dirty sooted up EGR valve then you are NOT EGR cooler deleted. The coolers job is to take some of the heat out of the hot sooty exhaust before it is introduced into the intake via the EGR valve.
If you look down in the valley of the the engine on the passenger side you will see the cooler.
The EGR valve is towards the front in this picture. The other circled is the cooler.

 

And to add, if you have a smart phone or tablet you can download an app such as Torque Pro or Forscan. Also buy an OBDII ELM 327 Bluetooth adapter to work in conjunction to scan for codes and monitor your truck's vitals such as coolant temp and oil temp, ICP PSI, IPR %, ect.
Monitoring and comparing coolant Temp to oil Temp while driving on flat land for 15+ minutes at 60 mph can give you an idea on the oil cooler health.
Read the tech folder at the top for a lot of valuable info to help you decipher the health of your 6.0.