LS swap fuel issues

[hath]

Hi guys,

I am currently working on a 73' that has a 6.0 out of a 2008 chevy express 3500. Right now it has an inline fuel pump, but it isn't hooked into the ecu so there's no communication between the fuel pump and ecu so it's running real wacky. I've been told of a few ways to fix this. 1. Go carbureted. 2. put a higher psi fuel pump in and plumb in a return line (right now it's a returnless system). 3. Use a stock (out of the donor vehicle) in tank fuel pump and wire it back into the system. Problem is I can't find the 2 pigtails that clip into the fuel pump. I've read a lot about the different ways to do this, including in line pumps, but I don't get how guys are getting those to communicate with the computer. Any info. would be great. Thanks.