Fitech Dual Quad fuel plumbing with return line

67Dart273 said

Do you mind telling us what you did? I cannot tell from the photo. You seem to have fed both inlets from one pump, right? What did you do with the returns? Do they go into one line? What size? And, did you ever measure the back pressure on the return line?

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Sorry.
Yes, one in-tank pump, 340lph.
For the supply side, I used the same distribution block I used with the carbs I was previously running (one inlet, two outlets).
For the return side I used a second, identical distribution block (two inlets, one outlet).
All lines are 3/8".
I did not measure back pressure.