Hi RoyC,
I presume that you still have the later Swingarm model A7SS. I think the earlier bikes had different oil fittings at the oil tank. Not sure when that changed. I bought a kit from Paul Goff (NORBSA), and was advised that the kit fits easily. That info may be relevant for early models. However for my 1961 GF, I had to cut the pipes that you have illustrated. I flared the tubes to prevent the hoses from slipping off and used jubilee clamps to secure the hoses. I also flared the filter head tubes as they were also unflared, but could not fit a flaring tool, so used a Philips Head screwdriver to fashion a flare. I have attached shots of the tube mods and the fittings around the oil tank. I have images of the Toolbox mods in an earlier post. I can dig out the reference if needed. There are plenty of photos of other peoples installation. The oil filter will only fit in the toolbox of later models with the curved toolbox cover.
Col