Official NBS 4.3v6 to GEN 3 V8 swap Guide

[Katana]

My silverado had only one fuel line going to motor. I think I might have to find a return line from a v8 setup

[Selbyvince]

My silverado had only one fuel line going to motor. I think I might have to find a return line from a v8 setup

If your truck doesn't have a return line, all you need to do is swap your fuel rail setup to a returnless. My motor came with a return style fuel rail, all I had to do was buy some returnless fuel rails off ebay and swap them out. Youll either have 2 hard lines coming from your tank or 3. If you have 2 your truck is returnless (feed, EVAP) and you need a returnless fuel rail from a v8 truck, or youll have 3 lines coming from the tank which means you have a return style. (feed, return, Evap)

[Gemini]

If your truck has a return setup and the motor is returnless you can also run a filter/regulator from the C5 corvettes. I used a WIX 33737 it's $40 from Summit and has an internal regulator thats set at 58#.