There were several different tractors built that looked some what like that tractor. Some were studio tractors that had wooden hoods and no engine, like the one in the picture. There are other pictures of that tractor showing a saw horse holding the front end up.
The real test tractors looked somewhat like the picture. Some had White 429 cu. engines and at least one had a Moline engine. There is also a picture of a real tall looklig 2150 with the expermintal White engine. That tractor had a 15 square hole front grill instead of the regular Oliver 12 square hole grill.
I have see several pictures of the above mentioned tractors. I don't have a way of posting them here. I don't have a extra copy of the HPOCA magazine either.