I think each application is going to be different depending on the system being used and personal preference. In my case, I am using the EFII fuel injection and ignition, so for the fuel system I used:
EFII double electric fuel pumps mounted in the tunnel
Two EFII pre filters mounted one under each seat
Andair duplex fuel selector valve and extension
EFII Pressure Regulator...mounted on firewall
Two 1/4" NPT aluminum flanges, one for each tank return
Closed end blind rivets for flange installation
Firewall bulkhead fitting
Tunnel bulkhead fittings
Fuselage bulkhead fittings
B Nuts and sleeves
5052 aluminum tube for lines
Adel clamps
And a substantial amount of time to fabricate the lines
If I did it again, I would probably just get Tom at TS Flightlines to make all the lines.