Correct fuel line diamter for a 3.2

[rolls 912]

Hi everyone

I have read through many threads on entire fuel line replacement from the tank to the engine.... After reading the posts I have become more confussed than ever. I was hoping to clarify some of these points once and for all in my mind....

For a 3.2 engine (running in a SWB):

I intend to replace the both supply and return lines with 8mm rubber fuel hose - is this okay?

I did read somewhere that I needed a 10mm supply and a 6mm return?

Is the rubber okay to use in the tunnel (wear)?

Your help would be greatly appreciated.

Roland