i can't answer as to the trunk latch being an option, but my 69 imperial had a vacuum release for the trunk latch. i thought that odd, because it had those sequential turn signals, [the wiring for those was a mess] plus, the rube-goldburg box that actuated them. one would think if that electrical nightmare was present, an electric trunk release would have been a piece of cake.
as to the hood release, i have never seen, nor heard of one, factory installed [or dealer installed for that matter] in anything up to at least the '90's.
just my experiance, your mileage may vary.