replacing fuel lines on my 379 pete

if you have rubber lines, do yourself a favor and replace the whole system with plastic. Regular plastic airline will work just fine. Been running mine that way for years. Free advice and worth every penny.

 

Plastic air line is just that - for air. Buy DOT approved hose for that job.

 

Do you have a fuel restriction guage in your truck? If its reading normal I wouldnt waste your time. If they are weeping diesel through or something than i would change them.

 

You can buy plastic fuel line that has a special liner in it. It is much more expensive , won't last any longer or somehow do a better job, but what would I know about such things. Only been doing this since "87.

 

I wouldn't worry about it then.

 

I dunno, I use rubber fuel line I don't know if they are better or worse but I do know that they have been reliable. Not sure what size you have now, but unless you have some sort of flow issue I would keep them the same 5/8 ID I think. You could go 1in that would get rid of restriction, but that may bring other issues to the door. Better to just replace IMO