I've brought this up in the description of my Toad upload and in the video's comments, but I'll bring it up here as well. I'm sure some of you have noticed, but a handful of the audio reels heard in the vintage recording were also used for the 1971 WDW version of Mr. Toad - these being the vocal version of The Merrily Song heard in the loading queue and Toad Hall, the loop of chirping crickets and owl hoots, the oncoming train and collision, and the cackling devils*.
With no further information, it's basically impossible to determine whether these specific audio reels were already in use prior to WDW, or if they were added at some point during the 1970s to mirror the audio used for Florida's Mr. Toad. What really makes this question so difficult is the fact that the recording has no date, so it could have been captured anywhere from 1968 (when Magic Joe first started recording Disneyland audio) to the late 1970s (considering the same muffled quality of the '77 Peter Pan recording). So regarding the question of when exactly these "shared" audio reels were placed into California's Mr. Toad, I've come up with four different scenarios:
The lamest scenario: The audio was produced for the WDW ride and added to the California ride at some point after the Florida version opened.
The second-lamest (and least likely) scenario: The audio was produced for the WDW ride but was added to the California ride shortly before WDW opened.
The second-best scenario: The audio both predates WDW and was not produced for it to begin with, but some of the reels may or may not date to California's 1961 mini-overhaul.
The best scenario: All of the audio heard in the recording is original 1955 material.
*The audio for the laughing devils was identical across both rides, except for the fact that the California version lacked the familiar low-pitched Satan laugh and slight distortion effect of the Florida audio. This implies that Florida's hell audio was actually an edited variant of the California audio, which presumably means that the California audio came first. For me, this is enough evidence to suggest that all of the audio in question here was used for the Disneyland ride first.
If Rich T. ever visits this thread again, I would love to hear his thoughts on this, and whether or not anything in the recording conflicts with his own memories of how the ride sounded.