I'm installing macs on a 93 LT1. I had to cut the fitting off the manifold, it got distorted, a wrench wouldn't go on. Can I just plug the hole in the headers and elimainate the A.I.R and egr? Or will this cause a huge tractor sounding exhaust leak? Does it blow exhaust into the intake, or reroute intake back thru the exhaust? Thanks for any input.