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Old 06-12-2012, 08:18 PM
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billonwheels billonwheels is offline
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I'm also building a 455

I was wondering what my Horse Power would be on my 1971 HO 455 Pontiac. I've heard it would be less than the factory, (330). I can't belive that. I have a 278 duration cam and lifters from Edelbrock, Edelbrock Perfomer manifold (spread Bore), it's bored 30 over with a Edelbrock 1411 750 Electric Carb. Roller rocker arms, Edelbrock 110 fuel pump, with a HEI dizzy. TH 400 Trans rebuilt with a B&M 2500 stall and B&M shift kit. The engine had 70000 original miles on it. My guy that did the machine work says at least 425 HP, 495 torque. Another guy that build engins says I went backward in horsepower, SMH.....everything I've read says 425 is a realistic number. I even got the billet pullies and an electric fan....
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