Sorry, the EP381 will support up to 450HP at 155LPH, that Walbro is 105LPH. I'm getting close to 435HP (according to Blue Print Dyno) so I want some wiggle room. OP may not be putting out that much so, your pump will probably work fine.It can handle 120psi, my 5.7 Vortec requires 63psi. Not sure I’m following you.