LS swap fuel system fittings - input welcome

[Jeepin Jeff]

Planning my fuel line system for the J10 5.3 swap and have come up with the diagram below on a cold snowy day with nothing better to do. I have already added the blazer tank behind the axle and think I will use 3/8 steel lines with stainless hose on both ends for both pressure and return. I made the little diagram just to help me see it properly and maybe even order all the correct stuff the first time. I would love for anyone to comment, approve, disapprove or offer a cheaper, better solution or recommend something I'm overlooking.
Thanks

Jeff

fuel line (Small).jpg

[FSJ Guy]

I think you've got serious overkill on the return line. In theory, the return line should have zero pressure, right? It's just dumping excess fuel back into the tank. No reason for fancy hoses there, IMO.

[Jeepin Jeff]

You may be right, what do you think of the OEM style nylon line for the return side? Been look at that and many people are comfortable with it even on the pressure side.

Jeff

[FSJ Guy]

I am not that familiar with AN fittings. Sorry. Someone else will have to chime in on them.

[ProTouring442]

I posted on the other site, but will post here for those who might also be interested.

Here's what you want as far as connecting to the OEM fittings: http://www.holley.com/assets/images/Pro ... onnect.pdf

Though expensive, I will be using PTFE lined braided from front to back. By the time you add up all the required fitting to go to steel, then back to flexible line for the filter/regulator, then back to steel, then back to flexible to go to the engine, the PTFE lines aren't that much more expensive, if at all.

The Nylon lines are OK, but getting them to run nicely seems difficult. Plus, they are fairly easily damaged.

This is the PTFE lined braided line I am going to be using. By using line that is PTFE lined, it won't allow fuel to weep through the line and stink (and eventually destroy the line).

https://www.pegasusautoracing.com/group ... PLUMANFLEX