Following my visit to Norfolk and seeing their neat fuel cut off, I made up a bracket last night from offcuts from the footstep (got to go on soon when I work out how the covering will fix on later).
This simple neat arrangement lets you create a really positive fuel lock on fitting. Next step will be to check the valve install is smooth and operates in the correct sense (ie open is open !) then connect up my new steel braided hose through the firewall.
There are a few parts to the fuel system that are new to me .. the bowl, gascolator etc …. but have identified where most parts will locate. Need to get my broken rivnut mandril back and get more holes through the firewall.