Ok, thanks.If you keep the computer-controlled QJet and HEI and the original PROM, the computer will adjust fueling and ignition on the assumption EGR is working, and it wouldn't be good if it wasn't. So you'd probably want to either take your chances with a rigged PROM that disables EGR, or ditch the computer entirely and install pre-computer QJet and HEI. But either of those approaches assumes you can get away with it in your state, inspection-wise.