engine troubles

The front two cylinders on the left side of my 383 stroker Iroc are burning thru spark plugs like its there job. my car is runnin a little warmer and i burn oil and have some extra smoke. especially when i run it a little harder. could it be a cracked ring?

is the plugs oil filed? it could be a ring, do a compression leak down test. it could also be valve seals.