You might find the answers to your questions in the Body Parts Illustration section of the 1966 Chrysler Parts Manual. In the front end sheet metal illustrations/expanded views. Might find the needed trim clips in the section for exterior trim items?
MIGHT take some time to sift through all of the trim illustrations and listings. There are illustrations for each trim level and body style. I believe that there might be a few illustrations which will include which clipe/retainers are used and what they look like?
The hood torsion bars would probably be shown in the front end sheet metal illustrations.
www.mymopar.com for the freeeee parts manual download.
Enjoy!
CBODY67