Not sure about the model designation on this one. It looks to be about the size of a model 118, that's about a D7 size machine.
I ran 118's extensively in Vietnam. They were equipped with Detroit 6V71 engines and were very loud. However, they were a well balanced and very maneuverable machine. We had some with rippers and some with winches. Never ran one that didn't have one setup or the other. Oh, some were equipped with angle dozers, others with straight blades. I preferred the straight blades myself.
Visibility over the front was excellent, never really had much issue with down pressure. Operation was straight forward and simple. Two sticks between knees -- use left hand to push sticks ahead, machine moved ahead. Pull back for reverse. To turn, move stick on that side into neutral and use individual foot brake, or pull one stick into reverse to counter-rotate tracks. Right hand controlled blade or ripper/winch, right foot controlled de-accelerator. High center of gravity, did not like to work on side hills much with them. Also did not like clearing operations on steep slopes.
This machine has a nice ROPS, ours did not. Late in 1968, Eimco's started showing up with Caterpillar undercarriage components. Word was that Eimco had gone belly up and the government, still being short on contract fulfillment, had commissioned someone to use Cat hardware to finish up those machines at the factory lacking undercarriages. The full story of that would make a fascinating tale I'm sure.
Eimco made a smaller machine that used a Detroit 471 engine. I only ever saw one and that was at the dump in Davisville, RI. The one shown here may be what I believe was called a model 104 and it's maybe been re-powered with something other than a Detroit, or maybe a turbo has been added.
I could be wrong on the models, it's been a long time.
I've looked for years for more info on Eimco and the short-lived dozer contract. Never found a thing.