Car smokes out left side.

I had a 340 decades ago that developed a smoking issue out a pipe. Just as you describe. When I tore it down I found I had detonated the ring lands apart. The top ring was good - but the #2 ring (oil scraper) was broken in pcs, and the 3pc oil ring was completely blown off and in the pan, with on of the actual ring sections wrapped around the cam. You just never know.