The carbs must be Zenith Stromberg and not the SU's also used on these cars. These are high quality Genuine Zenith Stromberg Kits made in the UK. Many of these cars have been fitted with the later TR4A engines and may also have the later SU carbs.
Genuine SU Rebuild Kit for H4 SU Carburetors MGA 1600 W/ Needles Does Both Carbs
Genuine SU Rebuild Kit for H4 SU Carburetors MG TF W/ Needles Does Both Carbs
Genuine Zenith Stromberg Carburetor Carb Rebuild Kit Triumph TR6 Does 2 Carbs
Master Rebuild Kit for Stromberg 97 Carburetor, Complete Gasket Set