Gas line size and approximate length?

[Dirtball]

My rubber line that goes from the tank hardline and up the frame toward the engine has started leaking... can one of you tell me what size and what approximate length I need to get to replace this? I'll go on and replace everything while I'm doing it... so the more details, the better.

[Mudrat]

My rubber line that goes from the tank hardline and up the frame toward the engine has started leaking... can one of you tell me what size and what approximate length I need to get to replace this? I'll go on and replace everything while I'm doing it... so the more details, the better.
Engine size? I think mines a 3/8 or 5/16 to the pump on a 360.