Just for awareness even on an SU I used to get hot start issues with the carb getting very hot to the touch from the manifold. This 100% cured it instantly.
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/123280793966
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/123280793966