Welcome to the forum! Lots of good people and information here.
London huh? There are 29 cities in the world named London. The fact that you left out a state or country leads me to conclude that you're talking about London, England. If so, how the heck do you drive your full-sized truck in that city? I had a hard enough time with a Mini LOL.
There are people here who have done this swap. Look through the thread that Downytide provided in post #15 above.
I went another route and traded in the truck for a new one with the 33 gallon tank. There were other options I wanted besides a bigger tank so for me it was worth it. Hope you're able to get the swap done.
