Stopping the knock: Lower compression and ported heads...

I'm no engine expert, but I solve other mechanical problems for work and otherwise. You gotta measure everything and nail it down, write it down. There's lots of guys here that can help, but without good hard data, they are in the dark. A picture is worth a thousand words, but doesn't give dimensions.

I recommend starting a Word document on your computer that you can copy and paste good info into, as well as keep your own notes.

My gut says get some quench and look to the cam to reduce cylinder pressure...but my gut doesn't count for much.