Do you want the car to go as fast as it can? If so go with the bigger CFM Thermoquad. If you want to run class at NHRA races and you can't outrun the 1971 340 cars run the AVS and hope you're as fast as any other car in the same class. If you're not get to work now so you can outrun them heads up    I would run the same class, same index, but at 150 pounds LESS than the TQ. Only difference is carb. How much is 150 pounds worth (index 11.85)? Same car, different grill, same 340 engine. At 150lbs it would have to be be WAY better. 150lbs is pretty close to .15 in ET Doug My thought also. I don't see the TQ making enough more power to overcome 150 lbs.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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