I would recommend disconnecting the EGR tube nut first then the 2 bolts holding the EGR to the throttlebody elbow, then take the elbow off. With the 1 1/16" wrench you should have plenty of leverage. Clean it all and be careful with the gaskets when taking it apart.
All done. I borrowed a wrench but couldn't get the nut loose so I just diconnected the EGR from the tb then removed the tb . Both ports were completly clogged. Seems to idle smoother now( maybe it's just me). Can I expect any mpg improvement ??