Air cleaner attachment

You've got the wrong air cleaner bail on your carburetor. The one you have is for use with the '63-'67 "small and tall" air cleaner. It's too tall to work with the '70-'73 air cleaner you're running. Either put on the correct bail or put on the earlier air cleaner (must be the ~9" diameter unit; the 11" diameter unit also takes the lower-height air cleaner bail).