What kind of Knock issues are you having? I think the sensor was desinged to work correctly on one spot on the block only. That is probably your problem. Was there not a spot for it where it was supposed to be?

Any drivability issues without the 7th maf wire? What kind of hz readings are you seeing at WOT? Are you using an AFC or anything to control fuel? Can you list some of the details of your setup?

Thanx