904 won't do anything

ok ...here goes ...my 66 valiant had a 360 backed by a A904 ran fine but got **** mileage so I replaced the 360 with a 318 I bought a new converter for the trans and installed them both now here's the fun part the motor runs great but the trans will not go into any gear or do anything ..and befor you ask yes the new converter was installed properly and lined up with the pump ( I went over this 5 times to be sure )...the fluid is at the correct level with a new filter ...there is no sounds or anything when you try to shift ..and there's no fluid coming out of the cooler lines as well ..but the converter is full I removed the plug and fluid came out ...any kind of advice would help because I'm stumped ...thanks