Those carbed cars can be fast, i know of two dudes around with carb setups running low 12's one with a 302, and one with a 347, the 347 felt slow when i rode in it, but thats because im used to the torque feel in my efi, also they run victor jr. intk, and just a small holley dp carb, well on the track i saw him rape a c-5 in e.t, and mph, gas mileage wasnt the greatest, it ran fairly reliable, except for those dang regulators......
With a more mild setup, low compression, dual plane, aluminum heads, vac secondaries carb, you could see high 12's, of course on a roller motor.
BTW, to uhh slow98, 5.0's dont feel like truck motors, not with a 5spd anyway, but i know my f-150 was blowing away civcs
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Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer
Race weight: 3,120
E.t-13.57 with 26x10.50's e.t. streets. 1.88 60'
mph- 99.92 mph