It depends what you want to do and how far you want to go with a rebuild. Here is what I used on mine. Cam - GM12364059 same as Crane 260H(comes in a kit that included matching lifters), Rockers - Comp Cam 1414-12 (1.6), Pistons - Sealed Power H692CP. I also used the moly rings with the pistons but don't remeber the part #. If you use the 1.6:1 roller rockers you need the adjustable rocker studs and must machine the valve guides. Look at gmpartsdirect.com and Comp Cam's website. Hope this helps.