Fueling & Injection - differences in years for fuel system?

hey guys what are the differences for the LS1 between 98-02? are they all returnless? i need a fuel pump for my 98, is the sending unit and regulator built in or do i have to buy those seperate? basically, here is my dilema...

im doing a v6 to LS1 swap on my 98 firebird and im using everything from 98 to keep it simple. well the v6 uses a return system and i need a new pump and i want to go returnless. how do i set this up? what pump, regulator, sending unit, and do i need to tap into the feed line to go back to the tank before the filter for the regulator? thanks guys!

98 has a metal tank, 99+ is plastic

For a returnless system you will need a regulator near the tank on the feed line.

Its too bad I trashed so much of my OEM fuel system otherwise I'd give it to you for shipping.

Syxx I came up with a sender with a Walbro installed this weekend from a 98 tank. Give me a call I will set you up. I could even have all fuel lines and everything if you want. We are doing a complete fuel system in our 98 car and are stripping everything out of it.

Nate