Rally dash in 74 duster

Yes, it is possible. I have a rallye dash in my '74 Duster now.

I did the entire conversion, ie, I did not buy a rallye dash dashboard, I cut the original to fit the rallye cluster. I would not recommend doing that. It wasn't exactly simple, even though its just cutting a "bigger hole".

I would buy the entire set up. Dashboard and cluster. Much easier to do, and it will fit far better than trying to cut the non-rallye dash to accept the rallye dash.

You can go without the rallye harness, I used my '74 non-rallye wiring and just moved the wires in the dash pigtail to where they needed to be. I have a diagram, but I'm still working out a few bugs with my dash so I don't want to post it up as of yet.

My thread isn't quite caught up yet, but most of what I did with the dash is here

http://www.forabodiesonly.com/mopar/showthread.php?t=198098