Check out p. 158 in the AIM, under Sec. 12 covering Engine Electrical, it calls for clip P/N-3906181. Rick's 1st Gen offers two different clips: #STR-10 for 67-69's listed as the "correct reproduction", $19.95, and #STR-8 also for 67-69’s listed as a "replacement" for $14.95. The one listed as "correct reproduction" includes the large round hoop as show in the AIM. The one I have shown is the "replacement”.
I was not sure what the large hoop was used for?
John....do you know? Was there certain options, etc. that used the hoop?