Single line from the tank to the pump, single line from the pump to the regulator, no return line needed. You will need a fuel pressure regulator. Check the carb manufacturer for pressure settings.
Do not try to wire the fuel pump without the relay. The 15-20 amps the pump pulls will overload the circuit. This will take power away from other items on the same circuit or cause the fuse or fuse link to blow.
If you need to run some new fuel feed lines or braided hose, here's some help. The 3/8" aluminum tubing works well, but you will need a flaring tool and bending springs to fabricate the lines. Braided hose is easy to run and route, but is much more expensive. It is about $3.50-$4.00 a foot plus the end fittings, which are $3-$4 each. Fabricating hose assembles can be difficult, but anyplace that makes hydraulic hoses can do it for you for an extra charge. See
Amazon Hose - Rubber, Hydraulic and Industrial Hose - since 1919 for more information.
For some help fabricating your own stainless steel hose assemblies, see
www.TurbineFun.com
For stainless steel braided hose and fittings for automotive use:
See
http://www.summitracing.com/search/?keyword=stainless steel hose&dds=1
http://www.summitracing.com/search/?keyword=stainless steel hose&dds=1
stainless steel hose - JEGS High Performance
See
http://www.eaton.com/Eaton/Product...rformanceProducts/FittingsProducts/index.htm for more information on High performance automotive hose products
AN fittings require a 37 degree flaring tool. A standard automotive or household plumbing tool is 45 degrees and cannot be used with AN flare fittings. If you do, the flare is subjected to too much stress when the fitting is tightened, and is likely to fail or leak.
See
MSC Industrial Supply Co. | Find Power Tools, Hand Tools, Machine Tools & More ,
McMaster-Carr or for the flaring tool you will need . Prices start at $85 and go up
MSC Industrial Direct – All Product Categories
McMaster-Carr
Last time I was in Summit racing, they had a 37 degree flaring tool for less than $40. It may or may not be a catalog item.