Not a Model A, the Model A Ford everyone refers to was model years 1928-1931. It followed the Model T.
Other than sheet metal, there isn't a lot of difference between the 1940 Ford and the last year of the chassis, 1948.
These cars had solid front axles, transverse semi-elliptical leaf springs front and rear, torque-tube drive (also used in some recent generations of the Corvette), and usually the Flat Head V8 of fame.
The solid front axle was great for poor roads or no roads. Not so good as time went on for higher-speed handling on paved roads.
I don't know if a 1940 would have had a water-operated heater as an option yet, but if not, shortly thereafter.
The brakes were hydraulic, no longer rod-actuated as earlier. But with a single master cylinder, a leak anywhere could cause real trouble... Cars didn't have split-dual master brake systems till the mid 60's. And ah yes, drum brakes all around... never stop straight in a panic stop!
The shock absorbers were cylindrical chunks of steel bolted onto the side of the frame rails, were operated by a lever attached to them, a dog bone link connected each shock lever arm to the respective axle end. Those vane type shocks didn't last long, they locked up and broke the dog bone links. In 1948, they offered as an option, a new-fangled invention, the monotube shock absorber, which are used today.
The transmissions were durable... and clashy, especially first gear if you needed to downshift to first while moving.
Cars of that era always smelled inside. I think they used horsehair in the seats, and maybe a bit too much horse with them
The roads on the route must not be too rough, as the list of participants has a 240Z on it!