Transmission lines

I think I blew it. I ordered new 904 lines for a '63 Dart but I received 3 lines. The 170 was replaced with a '68 225 truck engine and I am not sure about the transmission, it was still a trunion and push button. The '63's had external filters didn't they, that is why I got 3 lines.... When did they go away from this and just ran the lines from the radiator to the transmission?