I am a big fan of the 4" stroke engines. If it was my build I would go 4". Moves the rpm range up a little bit and kills a little bottom end.
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65 GTO, Tiger Gold, Nostalgia Super Stock 421, 2-Carter AFB carbs, Stock Suspension, 3550lbs Full Exhaust-- 9.70's@135
66 GTO (Retired race car)
421 CID
Multiple NSCA/NMCA World Champion
66 GTO 389 3x2, 4 speed, 3.90 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
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