When I bought my 1975 Mk III, it came with a Mikuni VM36. I have replaced with Amal (932s. The old airbox was cut to pieces in order to get clearance for the Mikuni. I would like to mount one of the oval air cleaners from earlier years, as I see some have done. I don't know how to adapt the old air cleaner to my bike. If anyone has done this and is willing to share pictures of the result/outcome, I would appreciate it.