Mark,
The same version of Node-RED and node-js runs on AEP-1.6.2. The Conduit is locked at Node-RED 0.15.03 and node-js at 0.10.x due to hardware limitations (the ARM processor is armV5 architecture and does not support the newer versions of node-js and Node-RED). If you have developed applications on AEP-1.4.x in Node-RED, they should work on AEP-1.6.2.
Jeff