http://store.summitracing.com/partde...5&autoview=sku
Click the link, and they had a save $50 on a $200 order, so you'd get the vortecs for closer to $500 for the set and new, just get the self aligning rockers, and a vortec specific intake, and if you want to use the valve covers you have, they make an adapter to go from center bolt to perimeter so you can use them on the Vortec heads, trust me 30+hp over any of these stock heads mentioned here and better performance than even the Dart's SR's etc, etc under or at .500 lift, after that the Dart's etc out perform the Vortecs, but over .500 lift is not really a daily driven street motor either, plus 6,000+ rpm and that is the only way/time any other head out does the vortecs!!
GET THEM!!