Looking for my original 383 HP F engine and 4 speed transmission, VIN stampings are 0B255521. I heard that near Chicago in the 1970s the early owners of my Challenger R/T convertible pulled the original running 383 engine and 4 speed transmission together. They then got a 1970 B body 440 HP and its matching 4 speed transmission that they installed together. This 383 HP engine/trans might be in someone’s car or garage. If it’s in your car I’ll make it worth your while to buy and pull them. Check your numbers! Any leads are greatly appreciated, PM me if you have any information. West Mifflin, PA. Thanks.