fuel pump alloy fuel tank 20vt

was looking at buying a fuel pump for 1.8t conversion eventually want to run 300-350 hp its got a alloy fuel tank mounted in the boot and want to run a external pump from that how much will the standard kjet fuel pump flow also what other pumps would you recommend had a look at sytec and bosch 004 will these work ok any idears anyone

K-jet pump does 5bar, 128 l/hr

bosch '44:
0 580 254 044 - fuel pump 5bar, 200 l/hr

cheers prob be better going for the bosch 004 then think that the kjet will be right on its limits