I guess I didn't make myself clear when I said the knock is between 2300-3500 meaning after 3500 it went away.
Anyways I have a 10:1 motor that I run on a full tank of premium fuel 92 or 93 oct. with 1 full qt. of max lead.
I had the dist. recurved by Schornack I guess I should be emailing him on his site.