Headers are the same for 400-430-455 Buicks.T/A Performance makes them,Kenne-Bell & Poston made them but are no longer in buisiness.The GSCA ones are no longer made,but the best choice,IMHO.Sometimes you can find them used on ebay or the Buick forums.Stay away from the ones made by Hooker!
Your pulleys will depend on which water pump you have,long or short.
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