...and if you get one of those fancy, bottom tilt bench seats you can put the fusebox under there.

Why put it under the dash?

If you can run vent hoses thru something like a narrow console put the unit in the trunk.

...and if you get one of those fancy, bottom tilt bench seats you can put the fusebox under there.

Oh wise and great one, please enlighten the unwashed and unworthy (me) ......from where would one find this seat?

My 35 Dodge (from years ago) had small slots at the bottom of the windshield that were cut into the garnish moldings. Those slotted vents were supplied with fan forced warm air from a tube connected to the heat unit. I can tell you the warm air forced through those small slots cleared the windshield very quickly.

I suggest you use the area under the dash for heat/cool and windshield wipers, and run the electrical not needed in the dash, to under or behind the rear seat. The voltage in the wiring won't care how far it travels before it reaches its destination. Warm air from a heating unit can cool pretty quickly in a cold car, you want to keep those heat caring hoses as short as possible. Gene

the factory wiper was a vacuum unit that was self contained above the windshield with just a hose running to it. i'm not sure if a second one on the passenger side was standard, or optional in 33. a dodge would be the same. i'm thinking they did not get mounted under the dash until the 40's ?

First off, a 35 Dodge (or Plymouth) is a much different car then a 33 is, lots of stuff changed in those few years.
Second, 35 Dodge was a pile of cut up rusted metal when I started, anything that may have been there originally was long gone when the "car" came into my possession. I'll post before and after pictures for your amusement.

That said, I learned very early in my build that if I wanted something I could drive, I would need to see what modern parts could be adapted. With that in mind, I have a 2004 PT Cruiser. That PT has fairly narrow bucket seats, and the non power passenger side seat in on a pedestal with a drawer in it. That drawer opens about 8" away from the seat bottom, one could mount the fuse box & whatever other electrical component he wanted access to in the drawer with enough wiring in a loop to allow it to be opened and closed.
On my 35, both seat bottoms were touching each other, a console would have been pretty narrow, especially if there was a shifter in it. I can't believe a 33 has more room between the doors then the 35 had, if you have not set some sets in the car yet, you might want to check it out before you make too many plans. Creating duct work is a pretty easy task, compared to the other stuff you have to do.Gene

As far as the fuse panel goes, I could put it in a drawer under the passenger seat. My '04 Dodge van has a similar pull out drawer to your PT. Probably the same thing. It could also be made to come out far enough to access all the wiring to the panel.

No. Because I have done it. (magic wagon drawer) I thought it sounded good too and it looks cool, but there are a couple of drawbacks (learnt afterwards of course) ; it takes a lot more wire because if you are using it as a distribution source then the fused power goes to the dash switch and then back to the panel and then out to the switched device, this all adds up to a lot of wire and becomes very difficult to hide neatly and interferes with the opening and closing of the drawer. Also the seat cushion sits overtop of the open drawer and limits accessibility. Ask me how I know all this? I will do it differently next time, with more accessible.
My shop truck;

I'm not running any type of heat or a/c. With the windshield cranked out and the cowl vent opened, that's just about as good as a/c. If it gets cold enough for heat, i'll park it, or get one of those heaters that you plug into your cig. lighter.

Oh wise and great one, please enlighten the unwashed and unworthy (me) ......from where would one find this seat?