I usually spend my time on FBBO as I only have B-bodies but I think this should be posted here also. I have a disassembled 1970 (F383) 383 HP. The story goes that this was removed from a '70 Challenger R/T in the '90's and replaced with a 440. The Challenger is supposed to still be in the Portland OR area. If you have a 1970 Challenger R/T that was originally a 383 auto car built in Los Angeles with the VIN digits of 137546 I have your numbers matching engine. It is a complete disassembled long block that has never had any machine work done with water pump, pulleys and motor mounts. Located in Central Oregon. I would like to see it reunited with the original car and will sell it to the car owner for what it cost me. PM if this is your engine. Thanks FEBO.