Heathkit SB-401 Assembly Manual page 120

As a minimum you will need Y1, Y8, Y9,10 and 11. to complete these steps.
For sure the Y1 to 8 that you want to DX on.
I'm adding step numbers to all major alignment steps.
On my schematic , I put red stars and blue STARs, the red mean factory test points and my blue
Stars are my SCOPE test points.