I have 2 of those F-145 Semi-Mounted plows and Love them..
The rear wheel steers that end in natural curves, forward or backward..
You will not get "Weight Transfer" as with a 3-point, but I can tell you, the weight gets there and you may need a couple of hundred pounds up front to keep it down in really tough going.. I pull mine with my JD 720D. and it walks right along in third and not showing any smoke..
This type of plow (I Think) are safer when transporting on a highway..you don't take the weight off the front wheels..steering is good..
I have pulled both of mine (4x16") With my 630 in established Alfalfa ground with Jack Wax.. about 8" deep..works the daylights out of it, but it stays in 2nd gear..!! Remember, 620/630's have a faster 2nd gear than a 720 D...
Shares, Landslides and Shins may be needed to put it in working condition.. I would re-pack the coulter bearings and drop the bottoms to clean up the pivot for each one...they get very stiff..
What will you pull this with.? It is going to take considerably more HP than the 2-cylinder JD's needed..60 to 70 HP I would say would be minimum.. They do a very good job of plowing.. Ron.