440 duster smokes sometimes???

I went out and crawled under it and looked all over the engine and I think it's trans oil. I think I have put to much in it and it slung up into the engine and onto the exhaust manifold. There was a puddle of oil in the bottom of the intake below where the carb sits and it didn't look like engine oil. There was a drop under the car on the trans pan and it looks like the same. I will check the level tomorrow. I was on a hill when I checked it and added a quart. I'm hoping it's just to much in there.