So the flow on mine is: 100 micron filter at the tank, Carter P4070 pump (puts out 4-6 psi) next to tank, 100 micron filter just downstream of the pump, Returnless fuel press regulator on firewall set @ 6psi (not really needed was a holdover from the Holley 750 and Holley Red pump I removed) feeds FCC, FCC out 30 micron filter to EFI unit.
A 30 micron filter comes with the FCC BTW.
https://utahbiodieselsupply.com/imag...omparisonB.jpg
Once you get the kit(s) prob good idea to start a new thread in the EFI forum. some of these posts as well maybe. This thread is morphing....