This was recently posted on the ClassicOlds forum. Those of you wanting your original radios repaired or possibly modified for Aux input might find this useful. https://classicoldsmobile.com/forums/electrical-5/radio-8-track-player-repair-restoration-153247/
Thanks for the info. I hope he won't mind working on common Chevrolet Truck radios. You know how some people are who have specialty vehicles feel about us "Truck Folks".
I’m guessing Chevy truck fanatics money spends just the same as Olds guys money! Pretty sure Delco radios of that vintage are pretty much the same.