I have a 2000 LD9 Cavi i blew the engine a few months ago (oil pump went out) anyways last month i bought another engine but i didn't do my research very well and i bought a LD9 that came off a 96 Grand am that's not the problem the problem is that GM in 96 had a EGR valve on this engine and stopped doing this in 2000 so i was wondering do i just block it off or do i leave it open??? also this 96 engine has a knock sensor but the bolt is way bigger than my current knock sensor does any one have any advice?