A 70 mm TB should work well. As for the mass-air, I would recommend a Pro-M 75 mm + - are you using a blow-through type? Pro-M has a new meter out, the Univer. You can get these in the blow-thru design in many sizes. Very nice units that meter very well from what I hear.
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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