Fuel Line Help

Here's the deal,
I am to the point in my build where I need to start to install my fuel lines. I have been told by a local vendor "we use 1/2" hard lines all the way" however my tanks (saddle tanks by TANKS, Inc) have 3/8 fittings for the pick up lines. Do I use an adapter from 3/8 to 1/2 or run 3/8 lines?
Here is my build so far;
30 Closed Cab P/U
SBC w/ mechanical fuel pump
700R4 trans
TCI CHassis
Saddle Tanks by Tanks, Inc.

 

I'd stick with 3/8"...

 

1/2 inch lines it's pretty big. I use 5/16" from my tank to my 265 Chevy engine. I would think 3/8 would be more then sufficient.

 

3/8" is ample...1/2 inch is for race or very high performance street application

 

Thanks guys, yeah 1/2" I thought was like a garden hose, wow. I will use the 3/8" I appreciate all the advice.