95 318 magnum install

Are you talking about the 66 in your avatar? I think the 66 & later transmissions used the later style speedometer drive setup. If you you have the later style speedometer drive and go with EFI & need a speed sensor there is a factory part that lets you use a cable driven speedo & also has the hookup for the speed sensor wires. I believe it's a truck part. I could probably find the part number if you end up needing it.