Brew I should add what I replied is the way My shop manual describes for the D series non diesel tractors. That is the way I do my WD. If I am not mistaken it would work on all Allis foucylinder gas models.
The way I get it in my head is set number one cylinder. from front to rear do two, skip one do one, skip one do one, leave two.
Then set number four and work the same way from front to rear.
Hope this helps.