rollit out flat on the floor and use something round and the right size to help make the bends
i have used a propane torch bottle and i have used wp pulleys to get nice rounded bends,have gone as small as a broom handle for small bends and coils at the ends
i went alum line on mine and ran 1/2" feed with a 3/8" return to the cell,with a short piece to the carb.
I used fex braid line at the ends and alum line down the frame rail
i also ran the alum line thru some foam insulation down the frame rail
good luck and take your time bending it up