47-55.1 S10 gas tank, fuel pump question

[8man]

I got the S10 frame stripped, except for the gas and brake lines. No tank, engine, etc. I'm going with a carbureted engine, and I need to run an electric fuel pump, because I don't have clearance for the mechanical pump.

Is there a low pressure fuel pump that goes in the tank? If not, where are people mounting the electric fuel pump?

Also, there 3 gas lines running from the tank area to the engine. My ignorance is showing, but from the tank to the engine I think one line is the main feed line, one a return, and I guess one is a vent. Do I need all three with the carburetor?

Maybe I missed a post on this, and I apologize if I did, but I'm confused on this.