Easy help with fuel lines please

[slikside]

I'm in the process of rebuilding my Q-jet carb and thought it might be a good idea to install an inline fuel filter between tank and pump (lest all my hard carb work go down with debris!) I have 2 lines INTO my fuel pump and one line out of pump. Am I safe in assuming that since the line from pump to carb is 3/8", that the supply line TO the pump is also the 3/8" line? The other line TO pump is 1/4". Fuel filters tend to work best when the fuel is going in the right direction!

I've looked at my resources and couldn't find the answer. I figured this would be a softball Q for the knowledge base on this board!

Thanks for any help.