Hmm, would you know why Ford put check valves in the fittings? How difficult would it be to remove the fittings?
I'm shoring/tiding things up. I have efuel and a regulated return. How big of a job is it to remove the stock steel fuel lines on the engine? Could it be done by just removing the air conditioner compressor? Tanks, selector valve, frame rail fuel lines, fuel bowl, and mechanical pump are already removed.
Sounded like the stock 3/8 and 5/16 lines coming from the frame.
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I believe if you remove the drivers side accessory bracket, you can snake them out. They both have quick connects down near the oil cooler where they unhook from. When i went to e fuel, i used all super duty parts, and luckily, the super duty upper engine fuel lines went right in place of the obs. I didnt like the idea of splicing rubber lines onto metal.
I made the connections down on the frame, and used the lines up the front as they were.The compression fittings werent so large in diameter that the rubbed on the block/accessory bracket, or were you able to bend them, or???