Late nights and very little adult supervision often breed genius. In this case, a hand fabricated stainless steel manifold exits vertically to a 90 degree and then splits into mounts for a huge Weber carb. At this angle, airflow would have been obstructed by the chassis. Solution? Chop out sections of the down tubes and replace them with a sort of integrated velocity stack. Healthy welds and thick wall tubing help maintain the integrity of the chassis.