I went to Aeromotive and copied this off their instructions for your A1000 pump.
Two things should jump out at you -- that they really don't recommend the use of a fuel pick up tube - telling you that this will cause problems - and wear out the pump quicker etc.
Mount pump level or lower and as close to the bottom of the tank as possible. If you are using a stock fuel tank, install a reservoir sump in the bottom-rear of your fuel tank. Exercise extreme caution and follow all manufacturers’
recommendations when installing a reservoir sump. (Sump part # 15650)
• Tank/Fuel cell must have at least a 1⁄2” tank vent.
• If you choose not to install a reservoir sump, then you must install a high flow capacity fuel tank pickup (1/2” to 5/8” inner tube diameter). (Installing pickup instead of a reservoir sump may shorten the fuel pump life and cause drivability problems. When using a pickup, you should maintain at least 1⁄2 tank of fuel in the vehicle at all times, to avoid possible engine &/or fuel pump damage.)
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