probably need some more information about application, estimated power etc. Im pretty sure basic layout was covered in Mark& Duncans R32 build thread. but generally you run a lift pump from your cell to a surge or header tank, then high pressure pump to rail, then return back to header tank, then overflow back to cell or main tank. There are intank pumps you can drop into the cell that eliminate the need for the header tank, but this all depends on application. can also modify cell to accomidate intank pumps as i have. Drag cars dont need the header tank, they just run the high pressure pumps off the rear of the cell.