I was out for a drive two days ago and while fairly under hard (~3/4 throttle) in 2nd gear the engine started to sound like it blew an exhaust gasket. I let off the throttle a little to ease the load on the engine and sound when away. Under light load the engine sound normal. I believe the noise is coming from the #3 cylinder/exhaust port. Everything else seems normal.
I thought it may a carb sync issue so I played around with the sync link, as it was off a little bit, but it did not make a real change.
I took a video so you can hear the sound, albeit somewhat muffled.
I really appreciate any thoughts or ideas.
Thanks and I hope you all are staying healthy,