Started taking another look at the fuel tank/pump set up...
Decided that the extra height from having the pump mounted on top of the tank would mean I'd have to space the tank down a fair bit which I'm not a fan of as I want to lower the rear end
Whilst looking through the scrap pile I spotted some 25mm angle so I fabricated a frame to recess the pump into the tank.
Just need to enlarge the hole in the tanks and weld it in.