Help me find the umph in my 360

It's weird I didn't hear the noise when I drove it back home. Granted I was only going 25 mph at low rpm. But I hoping it's something easy. Tonight I will pull the valve covers and check the upper valve train. I might just take the engine apart. And re degree the cam also. Or get another cam. Is there a better cam that works well with the stock converter and transmission but still gives a great power band?