I didn't see any restrictor jet in the old hose. (see attached picture) The old hoses were destroyed when they were disassembled, so thats why they are being replaced. Unless that white "T" has a restrictor in it, there was no restrictor that I saw.You don’t need to pressurize anything or pressure test anything.
Hose 2 in your picture is badly crimped and also has to have the restricted jet in it from the old hose.
Second there’s no reason to replace the old hoses as they don’t go bad.
As long as the pump pulls fuel from hose 2 and squirts it through the two nozzles into the tops of the carbs it’s fine. The only things that plug are the nozzles on the tops of the cards and the check ball in the pump.