Changing from the 69 to 71 setup would be a wiring nightmare. The ignition is in the column on the 71, in the dash on a 69. The 71 dash has no provision for an ignition switch. You would have to change the entire dash frame and wiring harness or drill a switch hole in the dash and splice all of the ignition wires.
Are you going to Carlisle? I bought this 72 parts car that I'm picking up and I'm taking there.
http://www.forabodiesonly.com/mopar/showthread.php?t=146768
The 72 will be a much better fit than a 69. Bring your tools and pull it all yourself for $100.