Depending on exact year and options could be a wide range of specs.
Wheel centers ( stamped steel.. or cast iron ) will make a big weight difference. Some can be as high as 4000#.. with cast centers, and wide (optional) fronts.
about 28-ish hp And some units had the rocker arms for power-troll.. that could be used to make a 3pt lift, if you can find the link arms and lower lift arms.. or if you want to make them yourself.. etc.. just some welding and bolting.
Also, there are a few people that make heavy 3pt lift kits for old farmalls, allis chalmers and JD's. they advertise int he antique tractor books.
That unit should have hyd remotes on the rear cover.
Could have a 4spd tranny.. or a 6, again.. depending on exact year, electric start, etc. Styled or unstyled metal.. etc.
I have a 1950 B. JD likes the price of those green parts. The filters are still available at most JD parts counters.. no special order or anything.. it uses a standard cartridge. When you cahnge the oil the first time boy will you be surprised. the oil filter goes in thru the bottom of the tractor under the engine!
A manual is available in cd or book form for about 90 bucks. Intertec also makes a manual for servicing the B at TSC, and other farm stores.
Soundguy