I mentioned this in comment #8 above. This is why I modify the stock filter housings by tapping them for 3/8NPT threads. 3/8NPT threads offer much better choices to go to AN fittings and flow much better than adapters to inverted flare......FWIW......
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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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