This is the part played by the flaming guitar of Bob McNett. It's trickier than you think because of how the phrasing is placed rhythmically and because of the sheer speed that goes unnoticed by the casual listener.

This is a lead part that ties the vocal phrases together with the rhythm section and ties the rhythm section phrases together and adds drive to the song. It's in the E Major scale with some blue notes.

The other noteworthy component is that it's played on a guitar that is tuned down to B. Not only is the tuning different, but also the strings have a strange, muted sound that can be created accurately by using flat wound strings. This technique was used by jazz guitartists of the day even though you would find this used on occasion by rock and country guitarists as well. This is strange for the period in which it was recorded. We have replicated this sound using a baritone guitar with foam placed underneath the strings near the bridge. This doesn't effect the tuning and it keeps you from having to palm mute the strings constantly.