Ok, thanks Roy. I have a sender with the 3/8 supply and 1/4 return I am wanting to utilize. I'm sure the 3/8 is overkill, bit I have the part and want a return, so I'm gonna use it.
I bought a 3/8 for my 66. It's there if I would ever need bigger/more with plenty of flow. I think it was Inline tube if I remember correctly. Hell, that was 10 years ago. I can't remember what I did yesterday. LOL
Think of it this way. If the lines were the same through the years Inline would only have 1 part number for all the years! LOL