yep , seen it before .There are a lot of dirt track cars in east Tn. If they pass the nail test and don't reach the oil ring ,can't be seen on any of the ring lands and can be cleaned up using 1000/1500 grit ,dirt track conditions ,hot fuel , valve train contamination , check the bottom of the cylinder walls for "crud" accumulation . Clean them all up dingle berry hone and rock and roll , if you notice anything into the ring lands turn them into ash trays
