I used EFI hose when I first did the mod. I took it out to check everything the otehr day and found the outer rubber was swollen.
Outside the tank the hose is great.
I have now decided to use stainless steel braided hose that I had left over from another job. Its an overkill but at least it will last inside the fuel tank.
I found out the braided hose is all nitrile, I don't think all EFI hose is nitrile on the outer case which is a problem if you put it inside a fuel tank.