the angle isnt the issue. the intakes all have the same degree off the china wall. its the bolt pattern thats the issue. and depending on your heads wether LT1 or LT4 were the runners land based on what intake your going to use. Vortech wont come close. Classic SBC intakes fit best but will take some massaging around the ports to get em to mate up perfect with the heads. but take an LT1 top end apart and the shit doesnt match up perfect anyway.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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