Ok here it is...'64 194cuin in my Nova. It is .030 over with a big cam, 390 holley, clifford intake & headers. Started er up today and before it was warmed up to 170 degrees while revving I got a MAJOR backfire throught the carb and it stalled. I get those occasionally when cold but this was a big one. On restart I hear a knocking noise. The knock is bearly there at idle but gets more prevelant as I feed in rpm. Oil pressure is noraml and a sample from the pan shows no metal (yet). Did not want to do further damage so I pulled the plugs and valve cover and cranked it. Rockers/valves look like they are doing their job. I am on my way to buy a compression gauge. Any ideas or suggestions to try to determine if it is top or bottom end? Darn just as the cruisin weather get's here too!
