1971 351 Boss Engine Car Shop Manual???

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Just thought I'd throw out there my cam..

http://www.jegs.com/i/Comp-Cams/249/32-221-3/10002/-1?parentProductId=

Just lopes a tiny bit and seemed to help out power throughout the entire rpm range.
494 ??????????????? come on now you telling me you can here that:huh: :p
Are you saying you don't think you can hear a 494 lift over a stock cam?

My son and I replaced a stock 351W 2bbl cam, .418 lift with a .445 and the difference was very noticeable. The idle was a louder(virtually silent before), little bumpier, definitely louder, but not lopey. Can't find the stock duration in the book.

 
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