I don't think any of the 4g63 cylinder heads will work on that 2.6l Starion motor. Your best bet on getting more info on Starions and Conquests I suggest is http://www.tristarion.com/cms/component/op..._smf/Itemid,36/
That message board is dedicated to those cars...I really doubt there is any members here that could answer that question. Good luck.
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