Cargo box on the back & chain drive. There are 1:18 die casts on the market of different types, including a fire engine. There would be room to add rc & sound. Good prototype at Statfold Barn Railway to model.The big issue is where to hide the motor - but whatever, it's worth pursuing
There are also the old Hubley metal kits which are mostly 1:20th scale and pop up occasionally. I have a Ford Model A somewhere.There are several 1/24 scale Model T kits on the market ranging from £25 upwards and which could be modified
Inave assembled a couple of ICF kits and have ordered a Revell one but none will be motorised I am afraidThere is another associated vid on Youtube showing the modification.
There are several 1/24 scale Model T kits on the market ranging from £25 upwards and which could be modified . All seem to be earlier models but perhaps that doesn’t matter too much.