20' of each. And conveniently enough Summit sells 'em in 20 ft rolls.
My -10 went from cell sump to pump mounted in the spare tire well. Then through well wall to frame crossover above rear end. Up drivers side frame, into frame, out into fender well (used to run it on top of frame...NHRA told me to move it) then back into engine compartment and up the front of engine to pass side fuel rail. I used exactly 20'.
The return -8 I had 2' left over because it went right to the return bung on the cell at the front of the cell.
