If Your like me and worry about the open air intake i have an answer Stewart's enginering the sunbeam people re manufacture filters for the S7,S8,I got two they will thread straight on to the Amal 274,276,They are a bit deep so i cut mine down to 3/4" and added modern filter material it hasn't affected performance one bit and they look good,Spring is on the way i cant wait to get back on my Mk 3 Sports, Regards to all Ray Dodds.