Hi Shaun, and welcome to the forum.
If you can wait a couple of days, I can check your frame and engine numbers against my Haynes manual. I'm out of town until late Friday.
Otherwise, someone else may chime in with the answer.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.