1969 340 dart listings?

Is there a specific site that has owners cars listed for 69 340 Darts (regardless of which model.. Swinger, GTS, etc). I have a date coded 9-9-68 340 short block that I'm willing to sell (posted in engine listings) but favorably hoping to find the current car owner that may have special interest and value in this specific casting, or maybe a 69 Dart owner looking for such a casting for his year car.