My wife gave me a Wallenstein BX 42 for Christmas and I plan on installing it this week on my Kubota BX2660.
But I was concerned that it might be one size too big for my tractor even. But after searching the forum threads here this morning it looks like my tractor can handle it, but I think my PTO hp at 19 is at the low end of being able to handle it.
So if a BX1860 has 6 hp less at the PTO , you might be pushing your tractor beyond its limits until, as you suggest, you upgrade. As for the weight it looks like both our tractors have same 3 pt hitch capability and the weight is in our range.
I will be hooking mine up this week, and will use it for counterweight for snowremoval work, and when no snow work will do a few tree limb piles during the winter and save the chip piles for spring to use on ATV trails.
I hope my tractor will run it good enough !
jake