A lot of my research is centered around site M-74 (1956-71) specifically...
It had both Nike-Ajax and Nike-Hercules. And, according to county files, the site had the nuclear-capable Improved Nike Hercs. (and all the fixings such as a fallout shelter, HIPAR, etc.)
It's a shame though. The launch site is currently owned by the GSA (who wants the city to take back the land)--and most of the site demolished a few years ago (before I had an opportunity to check it out). However, I've been on the site (with permission, of course).
I'd personally like to go to SF-88L sometime (the one that's been preserved as a museum) and look around.
I worked with a guy who had served with both Hawk and Nike-Herc units. He loved the Nike-Hercs (namely because he did not have to go out into the field and sleep outdoors).
Have you used Terraserver to look at the site? Those aerial photographs can reveal all sorts of details that are unseen at ground-level.