What is the Spark plug gap?

I have got a 4.6 l two valve 2009 Gap settings are all over the place online and the sticker's original stickers missing I don't know what it says the gap setting is I know the old pokémon pulling out here about all of them are still on 0.60 now I was told that they were supposed to be 0.43 The truck's running like s*** it's got a bad mess and I mean it was doing fine before so I mean I'm not sure exactly where I need to go do I need to put these gaps at.60 Because I'm getting tired of taking these plugs in and out.