Fuel Pump Question

I have always ran a Carter Mechanical Strip Pump. Now that I am running approx. 450 horse I am laying down at the top of third gear. But I just bought 3/8s line from The Paddock ( which was the most reasonable I found ) and a 3/8 fuel sending unit off the I net ( hope it works ). I am going to try the mech. pump 1st and see if it will handle the fuel needs. After all the Hemis were run with a mech. pump.