Ferry Tank Installation

[J.T.Grant]

Dear Sirs,
I am currently planning to take my 336 to Europe next summer via the North Atlantic route.(Goose Bay-Rekyavik-Glasgow)
Does any one have any experience with the plumbing for a ferry tank? I have already located a good source for a bladder tank, or I may just have a metal tank fabricated. So the question is how to get the fuel from the ferry tank, in the rear of the cabin, into one or both of the mains.
Any advice will be greatly appreciated.
Regards
James T. Grant