Fuel line size on a RB25

[leesredgt]

Im looking at finding a adapter for a fuel gauge so i can run it inline with the fuel lines.So ive found "T"'s but there all 3/8 fuel line adapter.The fuel line i put on my car coming from the filter to the FPR is 5/16.Is 5/16 to small of a fuel line,b/c it seems that everything is made for 3/8.

[leesredgt]

this is on a stock engine by the way

[ANVIL]

just switch the line to a 3/8