1974 Dart into a 1972 Duster

So I've had my 72 Duster for quite some time now. I've done most everything I need to get it "prepped" for a 360, and I'm finally at the point where I just need to throw an engine in.

A 1974 Dart came up for sale in my area and it's looking to be in pretty rough shape externally, but the seller just put a freshened 360(rated around 380hp) in. He's selling the whole vehicle for a decent price so I'm thinking of picking up the car and basically swapping engines and trannys. As I continued to read I discovered that it also has some recently recovered bucket seats too.

I'm curious what all I will need to do to get those buckets to fit in my ride. Also, what else could I swap over from that car to mine that would be advantageous? Engine wise, can I basically just swap k-frames and be done with it, or is there something different about the two years that I'm not aware of?