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Hi has anyone had any experience with Howards valve springs?The part i am looking at is 98738-A which is a fairly aggressive dual spring.thanks in advance
 

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I ran the Pro Alloy spring in one of my SBC's, OK if you keep it under 7500. 7500 or more invest in PAC or PSI springs. A PAC 1224 would be about the same specs. A little more money but well worth the investment.
 
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