Ok Fs one, first be assured I am not going to bore you with my years of experiance that just smacks to much of small sandbox dominance games and I will not go there. I will answer your question as to "what to do"

You are correct the Perry, Varsane, Conley instructions for the VP-30 regulating pump and the VP-20 ossilating pump both state that if the engine is to be stored for a period (without a suggestion as to how long) that a short jumper should be placed on the outlet and on the inlet sides of both pumps with fuel still in the pump.

Now if you want to run out fuel in the engine (remember thats up to you and I am not taking sides here as thats another thread) The procedure and exact answer to your question is to: with the engine running disconnect the fuel line at the engine and loop this back around unplugging the tank to pump line and plugging the carb line into the inlet side. The engine will run out, there will be fuel still in the pump and cannot escape and its only neccessary to defuel the tank from the tank line which is now disconnected. Thats it.

John