No EGR and I am using all the Reatta sensors, except for the crank and cam sensors also the injectors. The only extending of wires I did were for the injector plugs and MAF. I did figure out the TCC I was using a TCC control out of a 88. I replaced it with the 89 one I picked up the other day and now it all works fine. Just waitting on the new tuned chip from Ryan at Synister Performance, formerly GMTunners.com