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600hp w a 440 block is a time bomb.I saw 2 diff ones blow in one year...they did beat on em,but who doesn't.400 block is the real deal.JMO



I know alot of guys running 440 strokers that have held up fine. Most are street cars and probably make 500 to 600 hp. I have beat on mine pretty good for over 2 years. I agree over 600 hp on a stock 440 block can be pusing your luck but all the ones I have been involved in with 600 or less hp are holding up fine. Ron

Last edited by 383man; 08/18/13 01:43 PM.