Not a lot of stuff on AMFARE on the net, but here are two more items:
http://hackaday.com/tag/amfare/
http://archives.chicagotribune.com/1964/05/28/page/81/article/a-m-f-automates-drive-in-chef
The system cost $125K in 1964 dollars - pretty expensive.
And I wonder what cleanup was like?
Cleanup?