Howdy from Texas

Welcome from another 72 Duster owner, I have a mildly warmed up 340, 4 on the floor, and a bench seat, I don't see any reason why an automatic floor shifter wouldn't work with your bench depending on the style of shifter you choose. I would think though a 727 Automatic may be a better choice with that 360 than the 904.

If there is such of thing for a stock style radio in the dash, I wouldn't care about a CD player, but I would love a unit with Bluetooth capability, I have over 1200 songs on my cell phone and if it also has the hands free phone feature would be a bonus. I have a Toyota Highlander that has that capability I keep my phone's Bluetooth always turned on, and when I start it up the Radio automatically starts playing the music from the phone.