Smoking 318 need some ideas why?

So the 318 I have in my Dart is putting out the blue smoke pretty bad. To give you a little background the engine was built about 15 years ago, but probably only has 1000 miles on it. It was driven a little in a previous car I had. Then the engine was pulled and set for several years before going into the dart. It's been driven very little in the last 3-4 years while i've been restoring the rest of the car.
So, anyway the car is basically finished, repainted, reassembled and i'm ready to start driving the car. But now the thing is smoking bad.
First thing i figured, maybe the valve stem seals had dried up from the engine sitting so long with little use.
So yesterday I spent a few hours replacing all the valve stem seals. This morning I buttoned it back up and fired it off. No smoke at first, but after it reached full operating temp it started smoking pretty bad again.
I dont know how a basically all new motor can be smoking so bad, need some ideas? Maybe the rings are bad, or stuck and not sealing well from spending so many years not being used ?

I was all set to take the car to its first all mopar car show on sunday. But now i'm not sure I'll make it there and back without getting a ticket for visible smoke. Plus i'm basically out of money and now have for fix a smoking engine.
Just pretty bummed out, spent a lot of time on the car in the last year trying to get it finished and ready to cruize and now this. Just sucks.