Want to change air filter...

[treetop_73]

Hey guys. I don't know much about these trucks or the engines that came in them. This is what I have under the hood, 350...

I want to change the air filter to something like this... (I borrowed this picture from moneyeater, if you want it off, let me know.)

My question is, do I need to change the carb, or just the air filter assembly? And I seem to have more hoses coming from places than most the engines I see on here. And I don't mean all the other chrome on it, just the air filter assemby but this was the first pic I found.

Thanks in advance