IDE cables have some interconnect, so i think this replacement will not work but certainly you can have a try.
Some interconnect? What do you mean by this?
They are 40/80 ping across the two connections with no twisting.
http://static.ddmcdn.com/gif/ide-ribbon.jpg
IDE cables have a missing pin.
Pin 20 isn't missing it's just covered because it's not used by the IDE controller, plus they added another security feature to make sure you don't plug the cable in the wrong way. In my case I can get straight through 80pin cables that don't have pin 20 blocked.
If it's covered it's missing because there's a pin hole missing (therefor missing a pin on the other side) where one should exist ... 80 pin cables are wrong as the IDC connectors used by Avalon are 40 pin ...
Did you even read what I said? (shrug)