Since a strobe is only going to give you standard timing and as fuel is now different now I can't see the point. My M21 was rebuilt as a magazine project bike with the the timing set exactly. It was wrong. I had to advance it a bit to get it running just so.
Oh and whilst the military specified 50 for the engine Pitman quotes 40 for winter and 60 for summer. The army just standardised not optimised. I don't know if Morris do a straight 60