The Ford 1 tons of that time were running the V-8 Flathead.  If you don't already have one in your stash, there are plenty of aftermarket 3-D possibilities out there...just keep it stock, and no hot rod goodies.  That engine was tough to beat in its day....I have a 1950 Ford F-6 cab over build on the back burner that will have a V-8 flat head for power.  Visually, it will look the same @ 1:25 no matter if it was a 221 C/I or 239 C/I as it was the bore and stroke that made the difference.        

This is great info! That’s the research material I’d need to make one.

I was wondering what that thing was, thanks. What is your guess as to the engine type? I was also trying to make out the rooftop light. I agree, it has an odd shape. It’s the AAA sign, that would make sense.

More on the roof top light ......     Since your Grandfather was an AAA emergency service provider, this would have been the roof top sign/light that is pictured.     For more history info. look up Gillco out of Philadelphia ...they where the company making these type of signs back in the day. 

I found two other areas that are unique.....   The roof top...that looks more like a lighted sign (think taxi cab) than a beacon.   This looks like a cold air primer/starting aid (at least that's what we called them in the maintenance section of the Ks. Army National Guard)  Looks like there is a pump handle...either or ethyl would have been in the cylinder. Looks like there is a rubber hose running back under the hood.  

Great information. I would not have caught that. Thank you. I know little of that era of trucks. In fact, I didn’t even know he owned a service station until I found that photo in a box of old photos my mother brought me a couple weeks ago. He passed away a just a few months before I was born, and I’m his namesake. Now at age 46, you can imagine my excitement and surprise at finding a really cool truck with his name on it. I had no idea all these years. My mother was young at the time, and she doesn’t remember much about the Sunoco station. A future tribute build is a must.

I failed to add this to the paint colors......I don't know if you saw this or not....   This pictured shows that it is a P.T.O driven winch and not a hand crank.  If my memory serves me correctly, this would be a chain driven winch (transfer case - chain drive - winch)... the Holmes units of that era were chain driven as well...similar design....if your going to be building in that much detail.  Transfer case would be like the smaller transfer cases found on WW II trucks (2 1/2 ton and below) JEEPS etc. etc. 

Great progress!

Thanks, that’s helpful.

Found the colors that Ford painted their trucks in '41   ......  the darker blue and maroon colors would look great w/ the Sunoco logo and white lettering IMHO.