1973 chevelle 350 egr and vacuum probelms

does anyone know what the egr it suppost to be connected to ?? and does anyone know where i can find a diagram of what all the vacuum lines are suppost to be hocked up to? because that car as very little vacuum power and the egr is not hooked to nothing and its not blowing or suckin air! so i was wonder what was wrong and if it was suppost to be hooked up to something?

Your best bet is a factory service manual. Check Hemmings, Amazon, etc. for the right manual for your year and model. The Haynes and Chilton manuals may or may not have what you need. The factory manual will certainly.

Jim