The 7166 Dansco album for Kennedy halves is missing the hole for the 1976-s silver clad half. They list it on the back page, but no space.
You're right, though I believe the omission was intentional. This album was meant for the standard business strikes and deosn't have any holes for any San Francisco issues, none of which were ever intended for circulation. It also has no holes for proofs or satin finish issues, just the standard strikes (even though some of them were not meant for circulation.) There are other Dansco albums that do have holes for proofs, silver proofs, satin finish, and the 40% silver bicentennial, so if you want a more complete set, they exist; or you could just use unlabeled half dollar sheets for whatever you want to put in there. Depends on how strict your definiton of "complete" is.