Is it possible to tell just by looking if a truck has had any of the 6.0 upgrades done? Like egr delete? I know that you can't see head studs or anything like that but I am going to look at a truck this afternoon that is a 6.0 and didn't want to hear b.s. and not be able to verify it.
It's easy to see head studs just by opening the hood and looking around the valve covers. EGR delete is much more difficult unless they completely removed the valve which actually needs to be in place. The only thing you could see on my 500 HP truck was the exhaust and gauges.