Here is a fairly good article. Brief, but good for someone wanting to get into one of these cars.
https://www.hagerty.com/media/buying-and-selling/your-handy-1965-66-shelby-gt350-buyers-guide/?fbclid=IwAR0n1ly-xsxKp48Oc0CHauD28FHZRjumUaw2otu3viWWfYtmJFeTaa9-pho (https://www.hagerty.com/media/buying-and-selling/your-handy-1965-66-shelby-gt350-buyers-guide/?fbclid=IwAR0n1ly-xsxKp48Oc0CHauD28FHZRjumUaw2otu3viWWfYtmJFeTaa9-pho)
Here is a video by Colin Comer. I enjoy watching this.
https://youtu.be/gA-v1cIa3VA (https://youtu.be/gA-v1cIa3VA)