Anyone know where to find a scale diagram of the block off plate for the air pump.thanks

 

What blockoff plate? The AIR pump pulls air out of the plastic air inlet duct (5/8" vacuum cap required to block the connection), and blows the air through the tubes, hoses and check valves into a single connection on the header (or exhaust manifold) on each side of the engine. Those connections require a threaded plug to close off.

Is it possible you are looking for a blockoff plate for the EGR valve and/or the EGR riser pipe that runs from the #8 primary to the back of the intake manifold?