I want to ask if someone have this problem before I know these engine are known of having lifters problems I think this is what I can hear it only happened from 1500-2000 rpm with a little throttle. Sound coming from the intake side no is not a rod knock I just build the bottom end I will post a video soon I just need to know if is anyway to know which lifter is the bad one.
Check out this video on YouTube:
http://youtu.be/oIvnINa-dOM