You only need one vent that either vents to atmosphere or back into the motor. You should be able to buy a plug to fill the existing hole. Thats what I did when I ran those valve covers.
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04 Screamin Yellow Cobra
KB 2.4 (585/556 pump 626/666 race)
00R brakes, DFX clutch, Level 5's, return fuel system, Lts with 3" exhuast, FR500 wheels and all the other fun stuff.
GONE 1991 Lx sedan 5.0, 5spd (Liberty proshifted TKO) S-trim, Ported TF heads everything parted out.
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