Saw this parked on my visit to a Vintage Disneyland auction this afternoon. Hope this brings back some fond memories for some of you.
Neat! Looks the part but a lot going on, under the hood?, 2 pedals and that front axle??
Possibly some kind of engine swap has occurred.
There are two pedals and no hand throttle or spark advance lever.
It looks like it's on a Model A chassis with a frame extension kit.
Back last century when I was a kid and saw it at Disneyland it still had the Model T running gear with a Smith-Form-a-truck or similar frame extension and chain drive. Below is photo from the website at: https://davelandblog.blogspot.com/2013/05/main-street-usa-january-1964.html
The photo of today shows what appears to be the same body but I believe it has been mounted onto a 1928-31 style Model A chassis with the Smith Form-a-truck moved over.
Note the Model A car style rear hub. The Model A style (possibly a little later?) front axle and all the tie-rod ends etc. The larger Model A style front wishbone. I think the pedals are Model A Ford also.
Note also that the hard rubber tires and the Smith Form-a-truck really heavy duty rear wheel have been replaced with what appears to be standard Ford demountable wheels (adapted for the rear hubs).
Note the side view below appears to show the Model A style engine pan & transmission.
It may turn out to be some other chassis – but on the short review, my initial guess is Model A Ford car chassis with the Model T front cross member retained? And the Form-a-truck parts used – but not the heavy duty rear wheels.
And from memory of previous discussions – that VAN was not really used as a moving VAN but as an advertisement.
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Most of Disney's drivable machinery is custom-made.
The folks who are employed by Disney are talented take Walt Riddle for example - producing a period motorcycle from scratch.