Are you installing it next to the carb? If so, I used a 1/8 pipe nipple about 2” long and went directly from the outlet if the filter into the carb. In the inlet side, I used 1/8” male pipe to 5/16” female inverted flair adaptor. Then you use a 5/16” flare nut on you tube with a new double flare just like a brake line flare.
You can buy all of the fittings in NAPA, just bring you filter and fuel line and they should be able to set you up.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum