75 hp
the first john deere 3130 had 89 horsepower with the last of them having about 95 horsepower according to the books but most them that tested had 100+ horsepower
400
145
36 horsepower at the PTO and 30 at the drawbar
A John Deere Model 50 had 20.62 drawbar horsepower and 26.32 belt horsepower for more info on the 50 visit http://www.tractordata.com/farm-tractors/000/0/3/35-john-deere-50.html
36 at the PTO, 30 at the drawbar
84 HP (62.6 kW).
A John Deere 8530 had 330 engine horsepower, 276.3 drawbar horsepower, and 312.7 maximum PTO horsepower.
Here's a chart that will give you all kinds of info about the "B". Go here: http://www.johnnypopper.com/cgi-bin/jdstatsf.cgi?B
6 hp Kawasaki engine
The 3020 has 63.1 drawbar horsepower and 71.4 PTO horsepower.