the factory uses a 2 piece line they connect with a piece of 3/8 hose you have to get rid of that, and yes an tube adapter would do it too. i spent over 200 bucks on tube adapters and cracked one had to use something there.
there is a source in town for some tube adapters but not many.didnt want to wait on summit
I've only seen it hardline all the way up to the engine. Where is this 3/8" line?
The tube adapters are $15 each, assuming you have a hardline for a feed and return you would only need 4 (2 at the engine and 2 at the tank).