All good input, thanks for the replies.
Personally I have never been a fan of custom gauges in a classic muscle car. I feel like it takes away from the look and appears out of place, but that's just me.
Normally I don't like custom gauges in muscle cars either, I do like the new Mopar Proline Gauges, especially with them being back lit. If I could send my rallye gauges out and have them come back looking similar to the proline gauges with the back lighting then i would go that route, but I do not think it can be done (need to conduct more research). I talked to another company that makes gauge bezels and they are working on some layouts for e-body dashes as well. So I will see what they come out with.
Freak everyone out and use a 71-74 B body rallye guage cluster. They fit.
I had no idea they fit, interesting thought.