‘71 Demon with Ralleye Dash looking to retrofit Intellitronix

Yes I did see that the Ralleye dash and Non-Ralleye dash has two pieces as I did the research.

I am sure you know way more about these things than I do but I don’t get the attitude and innuendo. People sometimes come onto these forums to get help without being challenged on knowledge, skill and confidence boosts. If you want to add information great if not, don’t.
Sorry about that... I noticed you're very new to the forum and when I see people sending stuff out especially new people to be done but pretty much tells me that you don't like working on the car that much. But apparently you do just what you want to. That's fine it's your car it's your money... Maybe you started a thread on the welcome wagon that I missed introducing yourself and giving people an idea of what you are wanting to do with your car and what kind of help you are looking for and how you wanted to participate in the forum...
First point I'm a fabricator and customizer at heart and that's how I enjoy this hobby. Examples I gave like the truck was a bolt in deal for a customer but building my own dash facade in my truck is what I like.... It was mine I would take the dash bezel out that you have and build something back there that would hold modern gauges from until electronix in the holes that you have...
Also I use voice command so careful with things sound can jumble....