I have a fresh 489 going in my project. It's got 325cc Dart Pro 1 heads and a crane cams .632 hydraulic roller. It made 593 hp and 587 ftlbs with 9.6 to 1 compression. You can expect 600/600 all day. Dyno graph looks great. Peak torque at 3700 and Hp at 6000. I think it's got more hp in it, but they cut it off at 6000. Ihave the dyno video on the first page of my project. Any other questions PM me.
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Todd
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