I'm running 33* with my 331. Still need to experient though.
Also, vacuum under WOT should be zero and at idle I'm at ~11 or 12 in. hg.
E
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1991 5.0 LX Coupe - 40,750 miles
331 cu. in. / Tremec 3550 / BFG Drag Radials
12.22 @ 114.31 mph - w/1.89 60'
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