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Old 11-03-2013, 08:05 PM   #3
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,279
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Did you break the cam in properly? Flat tappets are pissy with oils these days.

As far as preload, minimum is best, 1/4 turn, but anywhere from 1/4-1 full turn is fine.

A lot of valvetrain noise is from rockers and cam. Which rockers are you using? Chances are the Edelbrock cam is just noisier than some, customs tend to be the quietest.
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Untested 331, lots of suspension, chewing up corners.
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