Rok, you "sho nuff" know what to say about music while cruising the Delta. The "Duece" had 8 track with "Reverb", it sounded like you were in a cave with an echo. Here's a picture of the duece; mine was a metallic blue green with a black vinyl top. I had forgotten what an elegant automobile that was.
https://www.google.com/search?q=66+electra+225+4+dr+hardtop&espv=2&biw=1024&bih=653&tbm=isch&imgil=gl0rj7De1prOlM%253A%253BwOsIdbru8WCCEM%253Bhttp%25253A%25252F%25252Fwww.v8buick.com%25252Fshowthread.php%25253F173456-66-electra-225-custom-2-door-hardtop-pictures&source=iu&pf=m&fir=gl0rj7De1prOlM%253A%252CwOsIdbru8WCCEM%252C_&usg=__UObN8ad7wr9UmdId9VEjPTRjL8A%3D&ved=0CCcQyjc&ei=XeaZVLL7LIOmyQSmh4KYAw#facrc=_&imgdii=_&imgrc=OcObqDA-i9UYgM%253A%3B5qSrVqgYum5ehM%3Bhttp%253A%252F%252Fupload.wikimedia.org%252Fwikipedia%252Fcommons%252Ff%252Ff7%252FBuick_Electra_225_Coup%2525C3%2525A9_1966_1.jpg%3Bhttp%253A%252F%252Fwww.gopixpic.com%252F500%252F1966-buick-electra-225-custom-hardtop-4-dr-used-in-upcoming-2014-%252Fhttp%253A%25257C%25257Cwww*2040cars*com%25257C_content%25257Ccars%25257Cimages%25257C97%25257C477797%25257C004*jpg%252F%3B1953%3B1424
While B B was the most popular King, Albert King was my man; I saw him live almost every weekend in the late 50's and early 60's, he played the clubs in St. Louis, E. St. Louis, and Lovejoy, Illinois, he got around. Here's "Cadillac Assembly Line";
https://www.youtube.com/watch?v=QOQE41oeHaY
Enjoy the music.