Got a 66 283 bored .040 over stock bottom end, 305 heads with Z-28 springs casting # 416,s. The heads were milled .010, with a summit stage 2 intake manifold, edelbrock 500 cfm, msd street fire hei dissy, and a summit #1102 cam 204 214 duration at .50, summit 1 and five eights long tube headers, and 2 and a half inch dual exshaust in my 67 camaro. Timing is 16 deg and 20 mechanical for a total of 36 deg at 2700 rpm. Trying to get carb dialed in and i noticed vacuum gauge fluctuating half deg and idle is not steady. When i changed out cam i noticed the bottom of the intake gaskets were oily. So thought about that and put my hand over the primary's and the engine kept running. so i think that happened again because i find no vacuum leak any where else. Now here is the thing i don't understand. When i pull out the pvc valve from the valve cover the engine runs smooth no vacuum or idle fluctuations. Anyone have a idea what that's about?
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