I had a Stockman years ago and found it to be an excellent machine.
Anyway, the dual pulley I have already (too widely spaced) has the following diameters:
A Section: 3-1/16" O.D.; 2" I.D.
B Section: 5-1/4" O.D.; 3-3/8" I.D.
I'd say the inside diameter is the critical measurement.
I think this pulley size would work only the pulley I already have is far too wide between the pulleys. Once I commit to any measurements it could be a very costly exercise going to an engineering firm, especially if they turn out to be wrong, so I will wait a while to see if anyone else can provide original measurements for the GT-2000.
Cox mowers have replied, only to tell me they cannot help. They only have crude had drawn sketches from that time and no specific information. Just goes to show, a lot of these early mowers were put together on the fly without any actual design plans.
