A few questions:
1) Did you ask SCAT what they recommend as far as balancing goes? When I purchased my rotating assembly, DSS recommended an imbalance of 28oz. They said that a 50oz imbalance would make the crank look like swiss cheese. So, I went with a Fluidampr 28oz imbalance damper, and Fidanza aluminum flywheel with the 28oz plate and ended up with very little drilling required.
2) Speaking of the flywheel...are you sure you provided your machinist with the 28oz counter weight and not the 50oz? This would throw things out of whack for sure.
3) Yes, there are neutral balance dampers.
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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