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Should be 3/8" Actualy,On the fuel tank sending unit,there are 2-(5/16") lines and the pressure line is a 3/8" line,but DO NOT use a standard fuel/emmissions line for the pressure line.This line should be a high temp. SAE J30R9 or equiv. fuel injection pressure rated hose.As for the other 2 smaller lines on the sender,standard fuel/emmissions line will be fine.I just happen to have one of these apart on my shop floor right now.I just soldered some bad spot in the tank and have totaly recoated and refinnished it.I hope to reinstall it in the morning.Hope this helps. tooldude56
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∙ 16y ago
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