Thanks! The engine is an IH C-60, which is a water-cooled 4 cylinder. The earlier ones (late 40s-late 60's) were 11 hp, later 15 and then 18 hp (production stopped in 1980) via carb and other minor changes. My 1966 falls into the 11 hp category.
As for remembering where the roads are... Mostly memory. There was no drifting, so I could see the outline of the edge in some cases. All of the roads are dirt or gravel. If I am a little off, oh well!
As a note, the Cub has hydraulic lift, but no hydraulic angle. I try to plow everything with the blade angled to the right so I don't have to get on and off frequently. If I get out to the camp in the winter and there is a lot of very heavy wet snow and perhaps a layer of ice, I do end up plowing in one direction only (downhill) which sometimes required me to adjust the angle. There are some folks over at farmallcub.com that have added hydraulic angling to their cub blades. If I used this machine at my home on a regular basis, I would consider it.
I find 3rd gear (which is the fastest), to be the most effective in most cases as it allows the snow to roll off the blade instead of bulldozing. When going uphill, I usually have to use 2nd gear. I also use 2nd gear for plowing parking areas such as near the big cabin, foot bridge, or barn.
. But also would like to toss my wing plow over to you to add to your enjoyment. 
