The AACA post you linked to is using the external adjustment tools to set the bands. Has nothing to do with throttle linkage.
The tranny in question being from a '54 Chevy truck (there is a label either on the passenger's side of the main case or on the lip just above the rear of the pan and to the left of center that will ID the model of the transmission) and I assume that the linkage is also from the same '54 Chevy truck, so I'd make the adjustments using measurements for a '54 Chevy truck.
As others have noted above, getting the throttle adjustment right at the tranny is very important with Hydra-Matics. And one turn on the trunnion can make a huge difference. GMC documentation specifies +- 1/32" and that is just to get you close enough to start adjusting.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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