This pair of SU HD6 carburettors to specification AUC963 is correct for Austin Healey BN7 and BT7 models with engine numbers 29D-H18656 to 29D-H26212. These carburettors represent the final HD6 configuration fitted to the 3000 Mk I before the introduction of the Mk II triple-carb setup.
AUC963 units follow the familiar side-draft HD6 layout, featuring side-mounted float chambers and jet assemblies that align with factory inlet manifolds and throttle linkages. This specification does not include the earlier automatic choke components seen on AUC935.
Fits Austin Healey BN7 and BT7 models with engine numbers 29D-H18656 to 29D-H26212. For earlier engines, refer to AUC914 or AUC935 depending on build range.
For long-term tuning and upkeep, use the HD6 service kit, which includes gaskets, seals, needle valves and jet assemblies for each carburettor.
