It's just a white, 5 gallon bucket; nothing special about it, other than it's next to some rusty car parts. Sorry, but it's all I've got. I am Butch/56sedandelivery.
I'm guessing you're single, 'cause a wife would make you clean up the yard before you start another car project.
Thet's ol' Ma Parker's place! Thet car body come up outa the wash back yonder. Ol' Pa didn't rightly allow it was in the Ford line, but said it was anybody's guess. Yessir...
Related thread: https://www.jalopyjournal.com/forum/threads/what-year-did-the-cowl-disappear.1194071/#post-13587780
I would think it goes thru the toeboard. That hole on the passenger side is quite likely for an old manifold heater. There are many Model A firewalls with holes in them for exactly that purpose.
I agree, those four holes to the outside hold that vacuum tank in place as seen in the above photo. Bob