in Qld an engineer will be 'reluctant' to pass a car with significant amounts of flexible EFI hose under the car. They'll be OK with flex line form the tank to the surge-tank and from there to the EFI pump.
Having said that, the wreck that i bought for its 1GGTE had flex line all the way from the external pump up to the manifold and everything was zip-tied to the underchassis - including the pump. i think the engineer didn't even look under the car.
just use the existing hard lines for the fuel up/return lines to the engine bay - they'll flow enough fuel with the right pump down at the tank. Use EFI hose for the plumbing between various pumps, filters and tanks that you'll have down the back.