I searched the forums to see what the end result of people with valve guide issues are and it seems that the original post just stops and the outcomes are not posted. I have a 2003 Cobra that I purchased back in 2003 with 1,000 miles. The car is an early production car with the known spark plug thread issues and the infamous valve tick. I started off with the usual mods like a pulley w/tune and worked up to a 2.3 Whipple with supporting mods. The car was tuned by Running with the Devil and was dyno tested to check A/F. I have kept the car clean and changed oil every spring or 1,500 miles. Currently my car has 14,500 miles and change. The car is not beaten every time it's on the road but I do know were the accelerator is. Recently I noticed that the car puffs smoke upon startup which smells like burnt oil. The smoke dissipates within 20 seconds and after that, it goes away until I start it again. I do have a Wideband Commander and the A/F is stable around 14.7. Other than the puff of smoke, the car runs great. So my question is, how many people just ignore the puff on startup and drive the car and how many get it fixed?