Anyone know the dimension [length] of the old special tool C-3763 called out in the 1966 [at least] shop manual for setting throttle pressure on the A-727-B automatic transmission?

I'm rebuilding my tranny [with 383 CID engine] and - well - I'm standing here at an impass unable to set my throttle pressure without knowing this tool size - it's a spacer used between the kickdown valve and the throttle lever cam.

If I can get the length, I can mock up a tool / spacer.

Any helpers?

Cheers from Chris in NC NASCAR Country