Well the problem is worse. Engine 351 boss. Had a broken valve spring caught it in time. Replaced the springs and seals. The engine never smoked before this all happened. It smokes on start up acceleration and deceleration. Don't know the history of the engine or did I have the cam specs. Should I pull the heads and have they done? Maybe the guides? The crazy thing is no signs of oil or carbon on the plugs. The engine runs great except for the smoke. Its not black its blue white. The springs were same diameter same height with no bind problems. The car doesn't get raced any opinion would be greatly appreciated. I hate thinking I need a complete rebuild, rings?, but it looks that way. Thanks.