Look at an underhood pic of the Zilla. You'll see a mushroom looking thing somewhat forward from the throttlebody. That'* the EGR. Same location on a 92 L27 IF it got one (late production).
In general, if you had the magnavox (square) coil and aluminum upper, you likely didn't get an EGR (there was no provision for an EGR inlet on the 92 aluminum upper). It feeds out of the front exhaust manifold just to the right of runner #5 as you face the engine. The EGR bracket is mounted to the driver'* end of the front cylinder head.