I have installed several modern retro fit radios through he years. They look great in terms of dash appearance and look like originals. But every one I’ve installed do not last long. I recently took one apart due to needle no longer moving left or right. Inside was near empty and everything looked very cheap. Probably not $5 worth of components inside. Found a “China” sticker as well. But they cost way too much for what you get. If you actually want nice sound, either buy a unit and live with modern look, hide a unit, or go BT. If I had an original radio head I would install it for looks but go with BT unit. The Retro Sound units are junk.
When I restored my dash I welded plate over radio opening. Installed a tube Bluetooth 6 speaker unit (the kind you see mounted to roll bars) under rear seat. Just have a simple remote. Great sound, easy install, clean dash.