Confirming rocker arm installation process for L6 230

[Praxiss454]

Here is my understanding of how I'm supposed to install the rocker arms. Please correct me if I'm wrong.

1. Rotate engine so #1 piston is at TDC
2. Rotate pushrod with one hand while tightening intake rocker arm nut with other hand.
3. Tighten until I start to feel resistance on pushrod.
4. Tighten one full turn more. (seeing conflicting info on this part. my 1965 GMC Maintenance Manual says 1 full turn. Online I see guys talking 1/2 to 3/4 turn.)
5. Do the same for exhaust valve on this cylinder.
6. Move on to the next cylinder, in firing order 1-5-3-6-2-4. Making sure the next cylinder is at TDC before proceeding.

Does this sound correct? My maintenance manual doesn't list this procedure anywhere that I can find.

Where does the specified torque value come into play? Seems like it must just be a value not to be exceeded.