Fuel inlets for IDA Weber

[sen2two]

For those of you running a down draft Weber. Have you noticed any benefit from running the fuel inlet to the top port instead of the side port?

I am using a Mallory comp 140 fuel pump and Mallory 4309 regulator with all -8 fuel fittings and lines up to the regulator. From the regulator to the Weber is -6. the car is a 51 mm IDA Weber. And I am debating on using the top or the side port to feed the fuel. I see most of therace cars that use Weber's use the top port, but still others use the side port. this card is setup for blow through if that makes any difference.