[AshG]

rubber hose down the transmission tunnel is a big no no!!!!!!!!!!!!!!!!!!

it needs to be metal. rubber hoses have a habit of degrading then splitting. that's fine in an engine bay or rear tub because you can see them and usually, the fuel drips on the floor. im presuming you are going to fit a removable cover over the bottom of your tunnel.

in a transmission tunnel when a pipe splits the fuel pools up until the slightest bit of static from your seatbelt ignites the vapours and burns the car out. have seen it so many times on locost builders.

fit 8mm copper from front to back its easier to run and you dont have to replace it every couple of years like you do rubber. look under any modern car their fuel hoses will either be plastic or metal but never rubber.

just use rubber for the final joins between the tank and engine, dont use them anywhere else