[Mulletwagon]

Sounds like you are describing "pinging" rather than "Knocking". Common causes for pinging is usually timing over advanced for the compression ratio/octane rating/fuel mixture (too lean)/engine loading. Experimenting with all the variables will provide more data and insight. I think most of us change the timing to full advance after starting and tend to leave it there. Not much hill climbing here on the Panhandle, but suspect going up a sustained steep hill may require a reduction in timing to avoid pinging. Please share what you discover.