assuming it is an s-trim head unit with the curved discharge, you would need the brackets and the intake tube from the blower to the throttle body and also the crank pulley (the crank pulley from his kit MAY bolt up but im not sure). everything else should be able to be re used.
Its not worth it, when I bought my kit I had to buy all new brackets because the guy didnt include them, and those alone cost $455 from vortech. Just buy mine when its up for sale in a couple weeks!