Egr?

[Torque]

I am in the midst of freshening up my small block and just need an intake and a carb to finish it all up. I was about to order a edelbrock performer air-gap intake, and was faced with a question I could not answer. I was given the option of a EGR and non-EGR intake. I went on the net and tried to find what I could about this little detail and could only turn up the function of a EGR valve. What I need to know now is what is the determining component that will tell my if my engine is EGR equipt or not? BTW my truck is a 72'. Thanks