There's already a swirl pot in the fuel tank (at least that's what I think it is.) It isn't "essential" to have a lift pump in there but it certainly does help.
On the surge tank issue. If you want to be able to drift (or turn a sharp corner for that matter) with a low level of fuel then it is a must. If my fuel tank is anything below 1/4 my car surges like crazy when skidding round a corner.
Easy fix is to just keep your fuel level above 1/4That's what I do.
