Some trial fitting for fuel supply and return lines. The pipes need to be shorter, but this combination of pipe and fittings will not require any boring of the plumbing parts:


The rear clearance issue was resolved (for one coolant tube) by removing 3/4" from the rear of the plenum box, which still allows enough room inside the box for the #6 runner opening. The rear stud will now be replaced by a socket screw inserted through the hole in the rear wall of the plenum - counter-bored to provide a flush fit for the top. The coolant supply line coming from the rear of the water pump will have to be slightly bent and one side of the fuel rail will need additional fittings to offset for clearance on the coolant supply tube:




Frank