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Mump 1003 10 Engine Dyno Test 1965 Trim
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Run in '65 trim (but with modern valve covers), our Hi-Po 289 produced peak numbers of 275 hp at 5,700 rpm and 288 lb. ft. of torque at 4,300 rpm. Though hardly considered a torque monster, torque production from the little 289 exceeded 275 lb. ft. from 3,400 rpm to 5,000 rpm.
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