[Josh Randall]

Thanks for the reply
I set the timing per the Les Andrews book..

Timing does affect the knock.. At idle with the spark lever all the way up it doesn't knock.. but pull it down 4 or 5 notches and it starts knocking... The noise is steady but without rhythm. I've been driving it with only 3 or 4 notches down and that seems to help.

Randall