Resolving air leaks, fuel hose questions

[SparkandFire]

One of the first things I did (per OilBurners' advice) was go after every possible point of entry for air, when I bought my truck.

I've got new return lines, new "olives" in all the hard lines on top of the engine. Stock water separator is unhooked.

The last thing I want to do is replace ALL the rubber fuel line in the truck with new stuff...

What size and type of hose should I order? Or, do I need multiple sizes?

 

[fast70]

did you check the lines to the fuel pump and the clamps can be big air intrusion problem also check the srader valve they can leak

 

[SparkandFire]

I think most of my air leaks are resolved now, she starts up real nice when she's cold. Good advice on the schrader valve, it's got a cap on it right now.

Mostly I was wanting to replace all the rubber hose due to it's age (as a preventative measure) and to be able to run B99 in the truck...