So, figure I would put a post in this section as well...

As I am starting to worry it might be a main bearing, or something in the valves.

Long story short...

went through carb,
most of the ignition system

Get a noise under load. I have about a 40 post thread in carb section, I want to link it here for more looks.

One worry I have is a bad main bearing, and the possiblity of why I hear the sound in all cylinders on one bank, and a little on the opposite bank it a possible piston slapping.

Looking for opinions.

Original thread with some info...
https://www.thirdgen.org/forums/carb...etonation.html


thank you for your help in advance.