1972 dart 360 with 904

Who rebuilt the trans ? They would be the ones who would have to know the year/model of the trans for parts. The proper Torque convertor. Because of balancing differences, the 904 was never bolt on to a 360. You can't find one for a very good reason. Companies don't make parts that they can't sell. 360 was very popular for about 20 years. 904 was very popular for about 35 years. 340/360 came with 727. 318 came with 904. Always exceptions but this was standard. Both engines out of production for over 20 years. Transmissions as well. Everything now is electronic, computer controlled. Aftermarket is geared toward popular performance applications.