my swap guy had a plan worked out but today a guy was talkin to him about my swap and he made a comment that both me nd him never thought of....

did gm have any fuel rails setup with a return that i could simply swap over and make up the two lines with stainless braided hose?

my truck is a 04 4.3l rcsb silvy and the new motor is 6.0l 2004.....truck has a return setup....new motor is returnless.

thanks

 

2003 trucks were return.

 

x2 2003 has return system

 

2004 is the changeover year.

1999-2003 have a return
2004 has both
2005+ are returnless

 

sooooo then i could just get a 2003 fuel rail and it would work inplace of the 04??? or will it not be accepted by the manifold?

 

It should work just fine.

 

nice !!

5.3l or 6.0l or 4.8l? they are all the same right?

 

since the 99-02 has a small vac port on the intake for the fuel reg . . . you'll have to run one with the new setup. There's one that's not being used on the passenger side.

It's a vaccum reference for the fuel pressure regulator, round disk on the drivers side.