i have a 2000 ram 3500 24v 2wd. i just bought a fass 150 hd w the bigger filters. it didnt come with the fuel lines so i might as well get 1/2" lines from the get go. where do i get them and what kind. i see some are single return and some are double return line lits. what do i need and where do i get it? i know this is a total newb question, but i am learning. thanks in advance.

P.S. i plan to also install a fuel tank sump (the kind you dont have to drop the tank) at the same time if that changes anything.

 

The only place I would put 1/2" line is between the tank, and the inlet to the pump. Besides that, 3/8" line will provide all the flow you need.

Check out Vulcan Performance, they have a lot of fuel system components:
Fuel Systems

 

okay. thank you. what about the dtt fuel line kit on Alligtor Diesel Performance. will that one work for me?

 

I believe that kit would have what you need. It's designed to go between the tank and lift pump, lift pump to fuel filter, and fuel filter to VP44.