Hello, I am working on a chopper basket case for my brother. Everything should be ready to go now except the carb situation. I have two sets of BS-38s. A 584 (earlier style) and 2F0 (newer style). I plan on combining these two sets for reasons that would take too long to explain, but I had some questions. What I plan on using: 584 style carb body Z-2 needle jet 502 needle The diaphragm, bowl and slide from the 2F0 carb. Will this even work and do I use the baseline jet specs from the body (earlier carb) or for the newer carb model to match the rest of the internals and bowl? Thanks!