The Holley 12-319 in-tank fuel pump with Mopar sending unit states that the outlet line of the fuel pump is 5/16th inch and can be connected directly to the Mopar 5/16th hard line (with suitable FI hose/clamps). I see people are saying use 3/8 fuel line. I contacted Holley with this question - their response was 5/16 hard line was suitable for up to 550 Hp. Thoughts?
