I ordered a two line fuel pickup/sending unit from the only supplier who offers it and out of the box it was defective. I ordered a second unit from them and it was also defective so I sent both units back for a refund. The problem is they start with a one line fuel pickup and they have someone add the second line but they are trying to solder a stainless steel line to a steel unit, and don’t add a line support like the original. After reading a few post on 70 to 73 fuel pickup I decided to make one from my old unit and a new single line fuel pickup. I was able to reuse the old vent line and line support and solder it to the new unit.
Pat
This is the defective unit I sent back, note the half a** solder job
This is the unit I did, note the line support.
The orginal unit