340 smoking out left exhaust only

It smokes the worst when idling. I know it’s cylinder 7 by looking at the plugs. When I drive and come back home it smokes a little if I let it idle after a few seconds it starts to spew smoke bad. One thing I forgot to mention is it pushing more than usual oil out of the breather on the valve cover. The breather is on the left side same as cylinder 7. It doesn’t have excessive amount of pressure in the crank case.