Supercharged A65 UXB

Another bike from Westonzoyland Sprint. Tim Howell's fantastic 680cc BSA. I Particularly like the extra head bolts to stop the bomb exploding, and the very rudimentary looking π shaped manifold. I guess if the fuel mix is being foie gras'd in the gullet, then it doesn't need the gently flowed inlet bore that a regularly aspirated carburettor has??? BP