Re: valve cover removal on 92 camaro v-6
Yes/no, plenum and runners need to come off. The lower intake stays. Of course that also means the fuel rail needs to be pulled. Quite the pain. The injectors can stay in the rail, and leave the fuel lines connected. The steel fittings into the aluminum rail tend to cross thread way too easy. The rubber feed lines give enough flex to move things out of the way.
If you have some compressed air, blow out the area around the injectors before lifting them out. Grit tends to build up in that area.