i might have not quite understand u bruv, but from what i can understand onces vaccum and ones petrol, petrol line will obiously plug into petrol on carb, the other there will be a vaccum on either carb or some lumps under the reedblock on casing
well either way on the speedfight theres 2 bits on the petrol tank that goes to the carb and to the manifold but theres no pipe bit on the sr manifold so where does it go