Depends on what you want to do and the money that you want to spend some guys will go with 105s and stock replacement timing chain others will go with ls6s. Some will go with 130s and double roller. It's just to many different set ups.. I can't recommend anything you just have to do your research and decide what YOU want to do and what you don't mind giving up. Several guys run different set ups and some had had issues and others have not.. That what makes it difficult to really recommend anything. Sorry I can't be more help to you.