How do go about installing fuel system?

I think you need to talk to the summit technical dept and see what parts will work best with a dual feed, return style regulator.
Also need to get a fuel pressure regulator and stay away from the liquid filled,ones as they give erratic readings when temp rises....this will drive you nuts thinking you have a problem and you will constantly,be adjusting your fuel pressure thinking your regulator is bad.

Look through some of the old posts in the fuel section as there is a link to a very informative site explaining all the questions you have about running a fuel system.