to get rid of at least one plastic clip, i think you can use the tube flare fitting, on at least one of the male outlets on the fuel rail as well, earls doesnt make both sizes though.
i really dont like the plastic clips...
http://www.anplumbing.com/TUBING_ADAPTERS.html
Oh dang, I didn't even think of that. I would have loved to get rid of those plastic clips. Oh well, an upgrade for another day...
Earls does make both sizes though - 5/16 and 3/8. I used the 5/16 on the stock hard lines.