So to set the stage, the Monaco has the factory original engine, and it's never been cracked open out side of the timing chain and oil pan off to clean the pickup screen. Now haven't been driving it a whole lot as there's bare metal on the body again, body work and all. Anywho, I noticed recently that it's smoking at start up off the right bank. Since about May it's smoked like I'm fogging the neighborhood the couple of times I've had it out to the driveway. Twice I've let it run to see what happened. Both times after it got warm the smoking stopped. Valve guides or seals. My thought anyway. However, today I took it to the gas station to fuel up as it's been getting low. Didn't smoke too much at idle, but it did start smoking about a block from the house. Every time I tried to accelerate it would smoke. Let off the pedal and the smoke went away. Coming out of the gas station about a mile away still smoked on acceleration. But less and less. Took it on a five mile ride and temps came up to normal about half way through the trip. Smoking stopped. Pulled over got out and both pipes were clear at idle. Since I was alone I didn't have anyone to hit the throttle. Jumped on it real hard a few time on the way home and nothing, not even a puff (watching over my shoulder and the mirror). I haven't broken out the tools yet but trying to see what the peanut gallery thinks. Guides or Rings?