replaced valve stem oil seals ... Still smoking ! 273 HP

The engine shown in the picture is NOT a sludge bomb. In fact it looks pretty clean for an engine that started out it's life with leaded gas. I'd say it has a pretty good coat of varnish, but not heavy sludge (would look like a coal bin). The Seafoam in the oil WILL soften the varnish, especially if you let the engine warm and cool a few times. Actually that engine looks good enough that I would skip the 10w30 flush oil and go straight to Rotella T6 (5w40) and just run that long term. The diesel spec oils will clean the engine and keep the carbon and such in suspension. Your best bet is to keep fresh oil in it and just drive it. The rings will release, it'll just take hot oil and time.

Thanks !
I had many engines apart and I thought it looked with a lot of varnish build up . I have changed the oil in it 3 times already with approx 250 miles on it at each oil change .. oil gets pretty black quick so , the oil itself must be loosening all the varnish up .. That's great !
I did pickup a can of seafoam for it today .. just going to pour 1/4 can total down the barrels of the carb when running ( warmed up ) ...then choke it off with more to stall the engine , then let it sit for a while and fire it up again.. maybe do that a few times ... the rest in the tank. hope that does it !
john