Holley 4150 fuel line.

Hi gents, thinking of building my own fuel lines for my 4150 HOLLEY.i AM PRETTY SURE I WILL NEED 2 5/8 lines, but what i don't know and wear to fine it the brass block that the 2 lines go into, who has done this and can you send me to the right place.thankssssssssssss again.Don.