With the GMPP TBI/Vortec intake manifold I won't be running an external EGR connection and I'll be blocking off the EGR port on the manifold, does anyone know where you can buy a threaded fitting to block of the EGR entry into the manifold? I was also thinking of plugging the two EGR holes in the plenum floor, to me it looks like fuel could enter the redundant EGR cavity under the manifold?