Return Fuel Line

[Lsttype]

I'm putting in a deatchwerks dw 300 pump on the tta soon and have a question. Is the fuel return line a bigger diameter than the return line of a turbo buick. It sure seems like it is. I can't compare sizes as my Ttype uses a 6 an return line and I removed the old factory one and threw it away. If the tta has a bigger return line I shouldn't have to convert over to a an6 line for use of e85. Thanks in advance