Bored Today, so follow-up to revisit
Power Brakes - If your Original Tri-Power/Automatic has all of the above AND power brakes then 65 and 66 used a unique (not reproduced) steel line that threaded into the bottom of the big brass block and four bends later attaches back to the rubber hose that connects to the PB booster check valve. I don't know how a 64 was set up with PB.
Pic of 65 below is from a popular GTO book, and 66 is mine.
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