no but you can still have too much cam for stock head regaurdless. listen to that thing it must have 45 degrees over lap atleast. i dunno just sounds big to me. bigger then i would have gone. it would be like throwing a T-Rex in a camaro with stock heads. yeah they flow better then stock LT1 heads do (and Hey SCrew Ball way to bash the LT1 no need) But regardless it would be Way too much cam for those heads,
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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