Correct, The CONTROL (Glove box) is just a vacuum and a very strong one I might add.
The POWER UNIT (Trunk) relies on a small wire/spring to recoil the rod mechanism back to the closed position. This system is about as basic as it gets.
As a side note FYI the PONTIAC control is the only unit that does not have "TRUNK RELEASE" engraved into the mounting bracket used by GM. Buick & Olds have very similar units with minor differences such as that but could be utilized if needed/wanted.
The Chevy units use the same "can" but the bracket mounts to the side not the top of the glove box.
The '66 Pontiac A-Body POWER UNIT is the only one I've seen so far that has an exposed mechanism at the rod end of the unit, all others I've come across have a covered/encased mechanism. Sort of protecting it from possible cargo impacts.
Even the B-Body unit is covered?
So it seems like Pontiac really CHEAPEN out on this
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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.