Ok, I was able to take some pictures of my '67 this weekend. I can't verify the originality of any of this, since I've only owned the car for about a year, but I will say that to me, everything looks original and undisturbed. This is a Dec. 66 Metuchen car.
OK...this is "My take-away" on the information shared to date within this thread about these canisters:
As NEW and as RARE of an order of the tilt column option is for the 1967 year, there isn't anything suggesting that many assembly workers didn't "already know where" to install the canisters when the build sheet showed to install the Tilt option. Using the terminology of "the show must go on", workers simply installed them in a quick best-guess location, especially on cars without the AC canisters, and on the cars with AC, threw the extra canister over the shoulder & just tied them in to THAT canister.
(this could explain the A/C examples like mine, that didn't seem to ever have the under battery canister)
This does not mean that many or most were not installed as the assembly manual shows, or the engineering instructions showed them to be. It simply helps as a scenario of "why so many differences" in mounting locations and/or canister design (oblong or round).
As I said earlier,
I am at least gathering the items to restore the installation of the 2nd canister under the battery should I decide, or it is decided later that it absolutely MUST be there. I might not install it just yet, true, but I will at least aquire what is needed to install it as properly as I can.
Chalk it up to running changes, differences in workers, different plants, I don't know...but there seems to be no definite answer on what was "correct" at this time. Original examples of all build dates, all plants and all workers are no doubt few and even further between.
Richard