Fluidampr
I'm running a Fluidampr (28 oz) on my 331 and it works great. Plus it's SFI approved.
They're a little pricey at $350, but it's a well made piece with a great reputation.
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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