port work was done by Ed's Machine out of Texas. they would have worked great if he put the right fucking springs on them. never trust anyone i guess. they will bring your compression down a little bit on a 350 stock bottom end. stock bowls are 54cc these are closer to 58cc. i have the flow sheet if you care. flow numbers really mean shit but i have them. i have one pic of the really bad head/valve retainers. and ill take another one of the other side tonight for yah.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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