Hi guys, I just noticed a new and interesting sound from the 316 today. I had just finished a carb rebuild and reinstalling the carb, and when I fired it up I noticed an new engine noise. The car idles and runs great, but I have a new clattering noise when revved up. I only hear the noise when the engine is revved (while driving). I took a quick video of it, you can hear it the best around 18-20 seconds in. Can anyone point me in the right direction on this? Any ideas on diagnosing this noise? Thanks in advance!