808toys

I need help!! I just changed my passenger side Head with a remanufactured Head. I set my original cam in it. According to the guy o bought it from it was straight and they checked it to make sure it was all good to go in.
So it starts up and idles,but it feels like its missing when i give it some gas. Under load it feels like miss firing. So i did a ob2 check and nothing comes up. No codes at all. And i got this noise coming from the front of the engine now. Sorry so long. Thanks for any advise and help.