I would stick with a low deck if I was doing the swap just because it gives you a slightly smaller package.The one positive thing you have is that they used a Torqueflite transmission so your shifter,kickdown,mount,slip yoke,and speedo cable will be easier. They used GM engine mounts.
Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60