I installed one of these in my motor last month. Real quality piece! Didn't have time to dyno test it like I wanted but pulled it apart last week after about 20 runs on it just to check and all looks good. The cam shaft endplay came within .0008 of where Scott set it at-I highly reccomend it-
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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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