Possible to De-certify an Ercoupe?

"FOR EXPERIMENTAL ONLY" instruments don't have approved model lists, as far as I have seen. We are just talking about flight instruments, not other appliances like transponders or ADS-B, those different animals.

Ronald,
Does your installed equipment include devices that do not explicitly have Ercoupe on the approved model list?
Tim

Ronald,
Thanks a bunch for that input.  Maybe that is the best avenue for me.  Anyone else have thoughts?
Tim

This isn't really an answer to your question, but it might clarify things. Because the Ercoupe was certified before TSO was a thing, you can legally install any instrument you want as long as it performs to the same standards. My plane is full of "for experimental only" instruments and my IA is fine with it as long as I don't fly IFR. The trick is finding someone to sell you the instruments, they worry about liability issues. Maybe you just don't mention it.

As many of you know I've been refining my plan to replace my entire instrument panel with all new modern equipment.  Many thanks to all of you who have made suggestions, especially John Jones who has spent quite a bit of time on the phone with me.  I called Pacific Coast Avionics today to order about $12,000 worth of avionics.  I thought I could replace my entire 6-pack with a Uavionix AV-30C EFIS.  The helpful salesman pointed out that I can only replace the artificial horizon with eh AV-30, and that I would still need to keep the other flight instruments.  That blows my entire plan.  By the way, I don't even have an artificial horizon or a vacuum pump now.  A couple of weeks ago I was chatting it up with a guy at the airport and he said he knew a guy who had "de-certified" his airplane, not an Ercoupe, and therefore could put any avionics he wanted into his bird.  Is this possible?  Does anyone know anyone who's done this?  I don't see any advantage to keeping my airplane ceritied.  My plan is to trick out my bird with good avionics and fly it the next 25 years until I can't fly anymore, so I'm not really worried about market value down the road.  Any insights or opinions would be appreciated.

Thanks,

Tim