Looks to be a mis-mash of parts as it sits, you would want to check bore and stroke measurements before assuming its HP/cc rating etc.. there will be numbers stamped on the carb itself (on the mounting flange) you can use those to cross refence the carb #'s so you get the correct parts. While those heads look neat, here in the US they were "Low compression" heads with a larger chamber in them, (cant tell from the photo's if its one or not). The shroud is around 1966-1969, the recoil is earlier, and bolted on where it should have been riveted on that version shroud, etc... Also look for a little folded over tag that is bolted to the valve cover or possibly a sidecover bolt. They made engines for some other companies as well and they used a little tag instead of the typical business card sized one riveted to the shroud even though the holes would still be there to mount that style tag might get lucky and find that to cross reference.