Contacted Franklin Cam Services in NZ, and they can indeed reprofile the "F" cam to either a single lobe or keeping it as a twin lobe cam with their "P2" profile. They need the lifters as well, for hard chrome and grinding. They will not reduce the original base circle diameter, so pushrods can be the same as before. Wondering if they then can get enough lift from it..? I would think that 0,40-0,42" lift should be ideal. They can also supply a kit with suitable conical valve springs, collars and retainers. Not bad. Now, I must go and find the hammer and put it to my piggy bank.
Ariel W/NG '40 "Bitzer", Triumph Thruxton '04, IZH-49 '56, Tempo Standard 150 '54.