Check out these versions for research:

https://youtu.be/ZF3En2gn7JI

Superfast Charlie McCoy

https://youtu.be/EavMMwjq9pI

Slow version Jonny Cash and Charlie McCoy on harp

https://youtu.be/765yN4ohndI?t=186

Medium version Jonny Cash on harp

https://youtu.be/Xhs5j7HN8wM

Fast version by Johny Cash with him playing chords on harp

https://youtu.be/xOK0126SIsY

Mike Stevens & Raymond Mclain - 2007 - Orange Blossom Special

https://youtu.be/DSphxkTLIoQ

Klezmer Company Orchestra presents Spirit of America: Gershwin & Copland. Randi Fishenfeld and Teresa Flores perform "Orange Blossom Special" during the Klezmer Company Orchestra's Spirit of America Concert, June 28, 2009.