High 12's is easy. I went a 13.03 @ 103.5 without the AFR heads. And that was without the timing advanced, with stock MAF, and running rich, with a blown head gasket. So i could easily get high 12's with the unported gt-40 heads. I know your car weighs more being a vert but with AFR's a decent intake and cam you'll see 12's with traction.
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90 LX Hatchback
306, AFR 165's 58cc, E303, 1.6 roller rockers, 70mm throttle body, cobra intake, bbk fenderwell, bbk longtubes, x-pipe, flowmasters, pullies, msd 6a, crane ps-92, stock MAF sensor, electric fan, No AC, No air pump, flaming river quick ratio rack
C-4, 3500 stall, 373's, aluminum driveshaft
SSM Lift bars, , sub frame connectors, strut tower brace
12.57 @105.12mph w/ 1.686 60ft before bbk longtubes (with equal shorties)
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86 tube chassis coupe - the trailor queen
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