Just doing the por15 tank thing today and took out the gas overfill boot and happened to look at the end. This is what I found. Could this be happening to U? Notice the dry calky tan stuff at the end of the tube.
Well can't say since I've only driven this car from California to Florida. She hasn't been on the road since I parked her in March. The cracks are what cause me to decide on replacing the boot. I've had her on jack stands and have been systemically going through every nook and cranny replacing and reconditioning everything along the way. I don't ever plan on selling this car, so I'm going to do whats right by her .... within reason. For instance the slight bit of rust I saw in the tank was enough for me to pull it out and recondition it. Good luck to you.