My 1983 Datsun 280zx NA is now blowing smoke (lots at startup) and then more noticeable while accelerating. The smell is terrible and leaks into the cabin. I tore this engine down to the head 3 months ago. New gaskets, R&R the head along with new valve stems. The works. I know blue smoke indicates burning Oil but I just had the head resurfaced, valve stems replaced, new head bolt, new gaskets all around. I swapped the PCV hoping it would help. Am i screwed? Oil levels definitely dropping. No performance issues that I can tell. In fact, it runs great. Haven't run compression yet. Any thoughts, ideas welcome. Thanks all.