O looked at your first reply and see the reason for the HMMMMM.
On page 23 of the "Operation Section" of the Ford Operator's Manual for All Purpose and LCG Tractors, 2000, 3000, 4000 and 5000, in the paragraph entitled "Manual Shift Power Take-off Operation, is a chart identifying the tractor and setup and then the engine rpm to obtain 540 PTO rpm.
First entry is 6 speed Ford 2000 and 3000 (Transmission PTO)
Fourth entry is 6 and 8 speed speed Ford 2000, 2110, 3000, and 4110 (Live PTO).
So sir you can lower your eyebrows!
I assure you my tractor is original, my tranny is definitely 3 hi and 3 low and I do have a 2 stage clutch.