First thing I would like to know from the OP is what the transition slot looks like? This could be the cause of the dead spot..no amount of jet changes or PV changes will help if this isn't correct. Cover the basics first.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
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