I doubt that valve guides would smoke under acceleration, they usually do it on De-celeration, and when you get back on it again. I would do a cylinder leak down test...borrow a gauge and learn how to use it, and do a leak down test...that will tell you how your rings are sealing. Then you'll know for sure if that's the problem or not. I wouldnt go pulling heads and other stuff without knowing what the problem is for sure.