This is gonna sound like my wife describing something to me but anyway here goes. Started the newly rebuilt 261 last weekend, ran it at 1500-2000 rpm for 15 to 20 minutes to break in the cam. Drained the oil and filter. This weekend, I started it back up and let it idle for a while looking for leaks and anything funny. Heard a noise that would come and go lasting only a few seconds each time and seemed to come from under the rocker cover. Was not coming from the carbs, exterior mechanical items, etc. Almost sounded like a pushrod was spinning quickly or like a pulley was loose on a shaft. I know that this sounds non-descript but it's the best I can do. Haven't retorqued the head yet nor readjusted the valves. Any ideas?
