New Parts../ Sending Unit

[71318Swinger]

Hey, Great weekend went on a summit racing shopping spree :toothy1:and ended up ordering a new carb intake and valve covers, so finished that up and had some funds left over so i decided its finnaly come time to replace the sending unit in the tank so that my fuel gage will finally work again.
Well at the local advance auto parts they have a few diffrent size outlets and i was wondering if any of you know what size i would need or how i would check on the 71 318 dart swinger.. theoptions are 5/16 outlet or 3/8 outlets

 

[pettybludart]

5/16 will be your stock size,3/8 for bigger HP and better fuel system.:rock:

 

[71318Swinger]

to go to the bigger size i would have to replace the fuel lines all the way up right?