I have a 85 307 that is just blowin oil out of the valve covers. it has slight miss at idle and doesnt puff smoke out breather so bad at idle, but on throttle it smokes and blows oil like crazy but loses the miss. no smoke at all from the tailpipe, so im kinda confused. at first i thought burnt piston or bad rings but no smoke from the pipe, could a headgasket cause crankcase pressure? thanks for all advice.
