Customizing a rally dash

Yeah They do. If not they look damn close.
I'd really like to know if a rally dash BEZEL would fit on a NON rally dash frame if the bezel had nothing in it.

No the cutout for the rally instrument cluster is longer so the dash is different to include the mounting tabs location. While it is possible to modify a standard dash to fit a rally unit it would be a project and you better be able to weld well. I researched doing this a while back until I lucked out on a free rally dash frame. They are available pretty cheap on ebay, in fact there are a couple on auction now. Search using "barracuda dash". I'm not sure (FABO members help here) but most a-body dash frames interchange 67-76. The problem is getting a instrument cluster. Complete and operational units needing refinishing go for $125 up over $300 and the bidding is fierce. I've bid on 7 or 8 over the past few months with no luck. I've had better luck (and prices) just asking here on FABO. Keep an eye on the for sale section or post a wanted add. Also do a search for "rally dash" for tons of info on modifying a standard dash and custom dashes based on the rally unit members have built.