yep this has the twin SU's
have a rebuild kit on the way
It was running awesome for 2 weeks, then went to start it one day after sitting for a week and it would just bog down under load.
but revved fine in neutral.
had it booked in at my local vintage car specialist (3 doors up from work) the next day anyway for a service.
they checked their suspicions about the choke not turning off, fouled plugs, blocked air filter etc... but didn't have an answer
Basically they said the carb is leaking fuel and needs a rebuild, and the distributor is worn.
wasn't worth them trying to tune/investigate further until I had sorted those out.
they gave me a nice list of things to address, with the suggested approach that I do what I can then book in with them for anything left over