Please don’t use film grain, its incredibly overused. If you do use it, make it as subtle as possible. If you do use it, don’t use a free one, those are immediately recognizable, create one yourself (or at least modify an existing one such that it isn’t recognizable). But don’t use a film grain, as the end result typically doesn’t look retro, it looks like you are trying to look retro.
Wiggle should go a long way. I’d have to try it to know for sure the particulars. Try making the wiggle so subtle that you only notice it when you are specifically looking for it. Also try it with the effect posterized so that rather than it moving smoothly it jumps, not sure if you’d want to set it to check every frame, ~24 times a second (simulate film frame rate), or some other rate (posterizing might not work at all, just an idea).
Though I think the biggest thing is going to be your color. Everything from back then was done on film which is going to have differences compared to digital. I’m not specialized in coloring, so I have no specific advice, but I do feel that getting your footage to look more like film than digital will go farther than the wiggle.
I’d consider putting in a cigarette burn at the end of the sequence. That might be too tacky.
I think the difference between something looking retro and something trying to look retro are in subconscious effects, as in things that affect the viewer, but the viewer is not consciously aware of. Most all viewers won’t notice the wiggle, or the difference in film and digital, but will view it as “not quite right” when absent or apparent.