I have a 1999 firebird I have swapped an LM7 into. It was the 3.8 v6 prior. I have the ls1 intake on it, I have both the ls1 fuel rails and the truck fuel rails. I know the ls1 is a returnless system and I have the catch can filter piece for that as well, would it be easier to just put the truck rails on it, especially if I plan on boosting in the future. And if I do put the truck rails on it with will it work with the existing fuel system without modification. I do believe I will need to drop a Kensmo fuel pump in the tank as well, what is your opinion and am I missing anything that will need to be done to get the fuel system working. Currently I have the engine mounted and the transmission, which were a bitch to get in and took some fabrication. Now I have to wire it. I also don’t have the ignition coils or fuel injectors yet so any advice there would be appreciated. I was thinking of going with truck injectors and stock coils.