Of course for Racing you can forget the Burman Its not as supposed just the wide ratio’s and the slow change the real ‘killer’ is the inability to depend on a gear engagement on slowing for a corner and expecting engine braking.
As for Albion the 40’s Gears were the Achilles heel look at a modern Indian Enfield gears and a 40’s Albion .It would be possible to cut about a RE box to look like a racing box (I have the small racing cover with the gear numbers cast in) it should take Indian cogs and there is a close ratio option (2 cogs) If you must go chain you may be amused to find that the duplex chain on the Enfield clutch is the same pitch as the triplex chain on the twin engine sprocket. But I am a belt man.
In the end since it must look externally correct for Vintage racing I settled for a set of AMC internals in a Burman envelope (we are not allowed more than 4 gears) it’s not easy but then nor is the Enfield/Albion path
As for Albion the 40’s Gears were the Achilles heel look at a modern Indian Enfield gears and a 40’s Albion .It would be possible to cut about a RE box to look like a racing box (I have the small racing cover with the gear numbers cast in) it should take Indian cogs and there is a close ratio option (2 cogs) If you must go chain you may be amused to find that the duplex chain on the Enfield clutch is the same pitch as the triplex chain on the twin engine sprocket. But I am a belt man.
In the end since it must look externally correct for Vintage racing I settled for a set of AMC internals in a Burman envelope (we are not allowed more than 4 gears) it’s not easy but then nor is the Enfield/Albion path