Watch the Classic Rock: Technique 2 online guitar lesson by Robbie Calvo from RhythmCraft
The classic rock track that I have put together is very reminiscent of "All Along The Watchtower" which was made famous by Jimi Hendrix and the writer, Bob Dylan. I'm approaching this vibe more in the style of Hendrix by playing the chords and adding some of those really cool Hendrix/R&B style licks from the A minor pentatonic scale.
The best way of approaching this is to play the Ami7 chord, G5 and F5/2 chords as per the progression and instead of playing the G5 on the last 2 beats on the way back to the Ami7, you play a lick from the A minor pentatonic Sscale instead. Check out the video and you'll see and hear what I mean. I'm alternating the licks to add some cool variations. You could start the lick on the 2nd and 3rd strings the first time round. The 3rd and 4th strings the second time, etc. The key here is to manage playing the first three chords and then still being able to articulate the licks smoothly before returning to the Ami7 chord.
This is a great chop building exercise if you've never alternated between chords and leads fills before. The chord progression isn't too challenging but pulling it all together with the licks should give you something cool to work on for a while.