Another ELECTRIC FUEL PUMP help thread. Kill me now.

I didnt think the ethanol would be bad for the aluminum? I can get it without, but not always. Havent started on the project yet. My dad has a b body sending unit that either 3/8 or 1/2 line. Was wondering if it would fit? I only wanna run the holley pump and bigger line because I do plan on hitting the motor with a 150 shot of nitrous.