[Marv D]

And the obvious, did you use a regular dino-juice oil for the first 500 miles or so? Synthetic will actually be so slick that the rings will take a long time to seat,, especially plain cast rings. If you had used a good plasma-moly ring then the inlay is soft enough it's not as big of an issue.

I'd suggest you see where you stand after the new valve stem seals. If there loose enough to allow oil til weep down and puddle when the engine is off, imagine what happens when the vacuum of a running motor does! Obviously anything wicking down the guide of the exhaust valves makes more smoke at startup and then pressure of exhaust helps hold that at bay while running. So oil consumption through the guides is typically more on the intake side. Look closely there when your changing seals.