Pretty cool video of Vic Elford talking about the early days of racing the 911.
Vic Elford | Rally Racing the Porsche 911 | Roads & Rides - YouTube
Part of this Youtube series,
https://www.youtube.com/playlist?list=PLp1iSequMhMI6MOdLuWVAr7kfGfDcJ8PH
Legends Of Racing:
Sir John Young "Jackie" Stewart | Formula 1
Sir Stirling Moss | Mercedes 300 SLR
Hurley Haywood | Brumos Porsche Racing Team
Sam Posey | Lime Rock Trans-Am Champion
Vic Elford | Rally Racing the Porsche 911
Brian Redman | World Sportscar Champion
All are very interesting, (particularly Elford on early competition with the 911, and Redman talking about his career, and the amazing fact that he survived)
Also
Playlist from Gunnar racing Q&A with Brian Redmond about the 917.
https://www.youtube.com/playlist?list=PLGQXLx_LBuPMRXxb2h0fDOQuVxB4jc7ms
And a series of videos on the restoration of chassis 917-021
https://www.youtube.com/playlist?list=PLGQXLx_LBuPPOAvT3pTAX0zA5Ufz4pxmq
If you are not familiar with Gunnar Racing, you can easily kill a couple hours poking around their past projects.
Gunnar Racing