I have a 85 camaro that had the v6 in it. I had a 350 out of a 71 camaro and it is sitting down in it nicely. the springs, radiator, shroud, and bell housing all have been replaced. I have a edelbrock carb on it now, but the car has 4 fuel lines coming out of the tank.

Which ones do I need to keep or is there a new or used sending unit that i could use?\

 

believe you need all of them, they ought to be vents from charcole canister, supply and return. use a 3 port regulator incoming, to carb and return to tank. do you remember where they went before you pulled the original engine?

 

One of the lines is for a vacuum controller and should not go the engine at all. One is a return and another is a supply. The last one is for the charcoal canister.

 

Don't have my service manual in front of me but I know the order.. it is supply/return/canister/vent.. I believe from left to right.. I just switched out my sender because of switching from a mechanical to electric fuel pump..