WHEN I BUILT THE SECOND ENGINE FOR MY ERA I WENT WITH THE HOLLY WITHOUT THE RETURN LINE. 140GPH MAY BE A BIT MUCH. I DYNO AT 650/640 FTLBS. AND RAN ONLY ON THE TRACK. SINGLE 850 HOLLY. HAD NO PROBLEMS. WORD OF CAUTION, MAKE SURE YOU INSTALL A
OIL PRESSURE SHUT OFF SWITCH IN CASE YOU HAVE A "PROBLEM" AND THE FUEL PUMP WILL SHUT OFF.