1973?
No wonder there are so many errors in your outdated information.......a LOT happened in the next 50 years, including J, K, L, M series primary metering rods, quite a few secondary metering rod offerings, and CFM testing using the later castings allowing the secondary flaps to open past 90 degrees.........FWIW.......
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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