Hey guys, got another ? for the experts about my 327 combo. I have a weiand stealth dual plane that i was goin to use just because its laying around. The problem is i prob need a single plane. However the heads i got 220 cc rhs iron which are big for a 327. I really need some 200's but run what i got and thought the dual plane would compensate. My ? is, the int says power to 6800 rpm. Will it exceed this without adding more volume to the plenum? I was thinking a spacer. I dont know whether i need open or 4 hole and how tall. What would happen with a 4 inch alum open spacer from speedway? Would this work, or cause fuel and air charge turbulence? Any advice is appreciated.