Hello All,
I had today Saturday off from study

So I did some research online....
I found a website that had a post "
REO Serial Number Locations. Accessed November 19, 2016 from,
https://reoclub.org/uploads/REO_Seri..._Locations.pdf
The booklet had this drawing of a "Gold Crown engined REO Speed Wagons to mid 1930s"
I made an enlargement of the image and printed out a copy and went into my shed armed with a torch and a brush. I have run out of degreaser to clean the side of the engine and I need to upgrade to a new wire brush as my old one fell to pieces. I have caught sight of what I think could be some stamped numbers/letters.
After I make a trip into town tomorrow to the local autoparts store to get more degreaser and a wire brush I might solve some mysteries and be able to identify my REO's engine and other details.
I will then dig and uncover the spare motor that could have been the original one for the truck or bought just as a spare. Tomorrow I hope to have some answers.

It does have "Chrome Nickle" written on the engine block in raised letters - they were relatively easy to see beneath decades of grease and dirt.
Oh Second drawing is what I hope is the Australian location of the Identification Numbers. Hopefully the engine numbers stayed on the same side in both left and right hand drive versions of the truck? Cross fingers
Kind Regards
Lionel