I was pressure washing my motor today before dropping it in, and after finishing this intake/exhaust side of the engine, i noticed these big white markings. At first i thought it was something of unknown substance that had melted onto the block years ago, but as i cleaned it up more and more i seen it was a set of numbers and letters. I have not seen anything like this before..(I'm only 20 so i have not really seen anything) it looks like maybe some kind of service number? i know this motor was never picked up from the junkyard as the PO bought the car brand new, didn't pass smog one year, and parked the car. im thinking that it might be rebuilt? im not sure any one else got any idea that can enlighten me?