Edelbrock Performer OR Stock 73 Intake on 340

Yeah. I always plug the floor jets with male square head pipe plugs. I use gobs of red locktite on them, screw them in tight, then cut the heads off with a wiz wheel as close to flush with the plenum floor as I can. I use an end mill on a drill press to machine them completely fulsh with the plenum floor, but I'm sure you could use a hand held grinder carefully and get about the same results. When you make that plenum floor flat, like the 71 intakes, then, they are almost as good as the regular non air gap Eddy Performer RPM.