return line for EFI conversion

You can get a new Walbro pump ~$100 w/ mounting kit on ebay. I recall 255 lph, but even the 195 lph would work for me. I have won new ones cheaper and used ones ~$40. As Bill_USN-1 says, there are many different fittings available that screw into the 10mm threaded ports. Most people use the 5/16" or 3/8" hose barbs. I have 2 big alum (blue) AN fittings that came on one pump. You can find those on ebay, or PM me since I'll never use. If you prefer, you can buy the same Walbro pump > $200 with logo from Holley, MSD, ... The other external EFI pumps I know of are either 5/16" hose only (Ford truck type) or strange fittings (Bosch for M-B, BMW, 1/2" tube suction, banjo w/ check valve outlet, and big body).