I am in the final stages of my build and I am searching for factory fuel lines from the sending unit to the pump. As well as a sending unit for the tank.

If I cannot find factory fuel lines what size is recommended 3/8" or 5/8"?

 

3/8" for supply and 5/16" for return is fine. 5/8" would be the same size as your heater hoses

 

Thank you I may end up doing that running rubber and double clamping the lines.

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On the suction side of the pump in particular, it's really better to do it that way anyhow. The o-rings on the quick connect fittings are prone to letting air in if there's any restriction. They perform much better under pressure than they do under a vacuum.

 

Now just have to find a sending unit for my tank. Only ones I can find new are ridiculously expensize. Trying to source a decent used one isn't going to well. And I need to replace the fill neck with the diesel one.

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