Before I start throwing money guessing at problems, I want as many opinions as I can get.
Car has done this since I've got it but I've left it on the back burner. Problem is when the engine hits 2200 rpm, there is an unhealthy chattering sound.
Current theories are bad lifter(s), dying spring, or a bad rocker(s) (shims and hinges). Car has no misfires or knock.
Please take a listen at the video, give me your thoughts. I don't mind replacing any of this but I hate to pull the top end off more than once if I don't have to.
Current set up is 90# springs and GT1 cam l36 block. I assume rockers, lifters and pushrods are all stock.
15 Seconds is when I really hit the sweet spot.