1965 vs 1966 273 AC accessory drive

For ‘66 I think there are TWO (2) different brackets for the tension pulley - and both have the idler pulley.

One like this that attaches to the cylinder head:

7B0DA4DA-5F40-4AE0-8874-549E0725D218.jpeg


Then there’s another and the tension pulley bracket is attached to the AC compressor bracket like this:

DBFCBF99-2196-4AA4-B4C0-3B05DF3F1807.jpeg



And I think it looks like this:
78D48916-012F-4640-A3A5-D989D9597FA0.jpeg