fuel pump push pull question school me

I know EFI fuel pumps are usally in the tanks to push the fuel......Whereas the mechanical pumps on the motor will suck fuel from the tank.....I am running a carberated motor but want to run an electric pump.....My fuel cell has top outlet and was going to use a red Holley Electric pump.....They state the electric holley pumps are designed to push fuel, not pull fuel....However, it states it will pull fuel from the top of the cell once a siphon effect is created.....Is anyone currently running this way and are you having any fuel starvation problems at WOT?.....My question is do they make an electric fuel pump designed to suck fuel from the top of the fuel tank? If so, what kind am I looking for?