Yep. Borrowed a lot. But with their pretty significant reshapings of those recordings. Its like saying The Who borrowed. The Who made the tracks their own as well. Plus KIlling floor., Can't quit you, Train kept a rolling ect have been perennial covers. So many versions of so many of these songs some of which were very limited recorded tracks in an era where much went unrecorded and was instead copied from live performance. 100's of artists covered the above songs. Maybe 20% ever ended up being recorded covers.
When the Levee breaks is a god example of a track that the original writers would love how it was revisited. As so many artists have done since.
As to Spirit check out 12 Dreams of Dr. Sardonicus with good headphones and maybe some bud. Oh man. I started listening to that when I was 12. You're just never the same after that kind of journey. Spirit were a very unique band with a Jazz rock sound with a Jazz drummer that was Randys stepdad. So much talent in that band. Randy California was playing shows with Hendrix when he was 16. What a tutelage. Every member of that band have been involved in so many other musical projects, bands, or as solo artists. Always in demand.
Speaking of borrowed what a trip this version of Hey Joe is: