I am in Ontario Canada and have the shoe arcing machine that grinds off material so that it conforms to the diameter of the drum. Measure the drum, set the dial to the diameter and run the shoe and linings across the machine and presto chango brakes that fit the drum.
An old time mechanic in Ontario told me back in the 80"s that Ford of Canada painted their engines grey. I have no way of knowing what shade of grey it might of been. Probably the same colour of grey the Model T engines were painted.
I do not know of any paint chips that are available for the Canadian colours. You may want to check with the Canadian Model A Foundation to find out what information they have. www.cmaff.com
All anyone needs to do is call the Shell Helps Line and find out what Shell says about their Rotella T 15w40 being used in a antique gas engine. 1-800-661-1771.
You can use pretty much any modern oil you want. If you have Babbitt bearings I would stay away from the fuel saving oils like 5w20. Many people use diesel engine oil and others use synthetic.
Canadian Model A's used a completely different number system than the American Plants. What you see as a zero is actually the letter O.
As to the engine number being from a late 30 in a early 28. It was propably a rebuilt engine that was in the system and back then nobody cared much about the...
The front bumper does look flat, maybe 28-29 bumper brackets are installed. Rear bumpers are from a 28-29. Something weird about the light switch/horn rod, it should be down more recessed into the steering wheel. If it was me, I'd be getting rid of that copper fuel line and getting a proper...