The VMCC hold all the original Amal build cards and should be able to confirm. I would expect the wartime contracts to have been fitted with the 276 as the 76 drew its pilot air around the mixing chamber body which would negate the fitment of an air filter as required for some theatres.
Amal publications indicate the 276B/1J from 1940 for the G3 but this may have been a retrospective recommendation.
However, AMC reverted to the 76 for post-war production so it may actually be a more efficient instrument if an air filter is not required.
Thanks, chaps! I will have a closer look at the 76 fitted and see if redemption looks at all feasible. But I agree, trying to make a silk purse out of a sows ear can be frustrating. I persevered with the worn out 276 on the WDG3L for years (even trying a worn out 275 at one stage) and only got that fixed last year when I robbed the internals out of a newish stub fitting 276 that belonged to a project Sunbeam that went to a dealer (at a knockdown price, so no guilt felt!). But I learned a lot about carbs on the way, I guess! Main thing is......they wear out. Throw away!
The alternative is let Martyn Bratby have a look at it. He can make them better than new but you'll need a spare if you can't miss the carb for a while.
