I just checked with a dealer in PA. that does the Aurora conversion for my 66 Riviera and was quoted $575.00.
Bluetooth, USB and cellphone ready. Turn around time is currently 16 weeks. Remove the knobs, pack well, add a $200.00 deposit check and ship it. If you have the AM/FM slide bar selector, that will still work correctly. If you have an AM you will have to turn it off and on to achieve FM. I currently have the AM/FM stereo so I’m going to look for a non working AM/FM radio and convert it.